Cardiovascular System
Cardiovascular System
Learning Objectives
By the end of this lesion, the learner should be able to:
- Describe the cardiovascular system
- Describe the structure and functions of the parts of the heart
- Describe the functions of different blood vessels
Cardiovascular System
- Consists of the heart and blood vessels:
- Heart is a hollow, cone-shaped, muscular pump; generates force to transport respiratory gases, nutrients, and wastes through body
- Blood vessels transport blood throughout the body:
- Arteries transport blood away from heart
- Veins transport blood toward heart
- Capillaries transport blood between arteries and veins, and perform nutrient, gas, and waste exchange
Overview of the Cardiovascular System
Two closed circuits (pathways) are included in Cardiovascular System:
-
- Pulmonary circuit: Carries oxygen-poor blood from heart to lungs, drops off carbon dioxide, picks up oxygen, flows back to heart
- Systemic circuit: Transports oxygen-rich blood and nutrients to body cells, removes wastes from cells, flows back to heart
Organization of the heart:
-
- Right side pumps to pulmonary circuit, blood returns to left side
- Left side pumps to systemic circuit, blood returns to right side
Structure of the Cardiovascular System
Structure of the Heart
Size and location of heart:
- Size of fist, varies with body size, averages 14 cm long,
9 cm wide - Located in inside thoracic cavity, in mediastinum, behind sternum, above diaphragm, near lungs
- Broad base lies beneath the 2nd rib
- Pointed apex lies at the 5th intercostal space
- Hollow, cone-shaped organ, containing double pump
- Divided into left and right halves
Blood Flow Through the Heart, Lungs, and Tissues
Blood Vessels
Blood vessels are organs of the cardiovascular system
Blood vessels form a closed circuit, transporting blood from heart to body cells (or lungs) and back to the heart
Types of blood vessels:
- Arteries: Carry blood away from the ventricles of the heart
- Arterioles: Receive blood from the arteries, and carry it to the capillaries
- Capillaries: Sites of exchange of substances between the blood and the body cells
- Venules: Receive blood from the capillaries, and conduct it to veins
- Veins: Receive blood from venules, and carry it back to the atria of the heart
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Cardiovascular System
Learning Objectives
By the end of this lesion, the learner should be able to:
- Describe the cardiovascular system
- Describe the structure and functions of the parts of the heart
- Describe the functions of different blood vessels
Cardiovascular System
- Consists of the heart and blood vessels:
- Heart is a hollow, cone-shaped, muscular pump; generates force to transport respiratory gases, nutrients, and wastes through body
- Blood vessels transport blood throughout the body:
- Arteries transport blood away from heart
- Veins transport blood toward heart
- Capillaries transport blood between arteries and veins, and perform nutrient, gas, and waste exchange
Overview of the Cardiovascular System
Two closed circuits (pathways) are included in Cardiovascular System:
-
- Pulmonary circuit: Carries oxygen-poor blood from heart to lungs, drops off carbon dioxide, picks up oxygen, flows back to heart
- Systemic circuit: Transports oxygen-rich blood and nutrients to body cells, removes wastes from cells, flows back to heart
Organization of the heart:
-
- Right side pumps to pulmonary circuit, blood returns to left side
- Left side pumps to systemic circuit, blood returns to right side
Structure of the Cardiovascular System
Structure of the Heart
Size and location of heart:
- Size of fist, varies with body size, averages 14 cm long,
9 cm wide - Located in inside thoracic cavity, in mediastinum, behind sternum, above diaphragm, near lungs
- Broad base lies beneath the 2nd rib
- Pointed apex lies at the 5th intercostal space
- Hollow, cone-shaped organ, containing double pump
- Divided into left and right halves
Blood Flow Through the Heart, Lungs, and Tissues
Blood Vessels
Blood vessels are organs of the cardiovascular system
Blood vessels form a closed circuit, transporting blood from heart to body cells (or lungs) and back to the heart
Types of blood vessels:
- Arteries: Carry blood away from the ventricles of the heart
- Arterioles: Receive blood from the arteries, and carry it to the capillaries
- Capillaries: Sites of exchange of substances between the blood and the body cells
- Venules: Receive blood from the capillaries, and conduct it to veins
- Veins: Receive blood from venules, and carry it back to the atria of the heart
Cardiovascular System
Learning Objectives
By the end of this lesion, the learner should be able to:
- Describe the cardiovascular system
- Describe the structure and functions of the parts of the heart
- Describe the functions of different blood vessels
Cardiovascular System
- Consists of the heart and blood vessels:
- Heart is a hollow, cone-shaped, muscular pump; generates force to transport respiratory gases, nutrients, and wastes through body
- Blood vessels transport blood throughout the body:
- Arteries transport blood away from heart
- Veins transport blood toward heart
- Capillaries transport blood between arteries and veins, and perform nutrient, gas, and waste exchange
Overview of the Cardiovascular System
Two closed circuits (pathways) are included in Cardiovascular System:
-
- Pulmonary circuit: Carries oxygen-poor blood from heart to lungs, drops off carbon dioxide, picks up oxygen, flows back to heart
- Systemic circuit: Transports oxygen-rich blood and nutrients to body cells, removes wastes from cells, flows back to heart
Organization of the heart:
-
- Right side pumps to pulmonary circuit, blood returns to left side
- Left side pumps to systemic circuit, blood returns to right side
Structure of the Cardiovascular System
Structure of the Heart
Size and location of heart:
- Size of fist, varies with body size, averages 14 cm long,
9 cm wide - Located in inside thoracic cavity, in mediastinum, behind sternum, above diaphragm, near lungs
- Broad base lies beneath the 2nd rib
- Pointed apex lies at the 5th intercostal space
- Hollow, cone-shaped organ, containing double pump
- Divided into left and right halves
Blood Flow Through the Heart, Lungs, and Tissues
Blood Vessels
Blood vessels are organs of the cardiovascular system
Blood vessels form a closed circuit, transporting blood from heart to body cells (or lungs) and back to the heart
Types of blood vessels:
- Arteries: Carry blood away from the ventricles of the heart
- Arterioles: Receive blood from the arteries, and carry it to the capillaries
- Capillaries: Sites of exchange of substances between the blood and the body cells
- Venules: Receive blood from the capillaries, and conduct it to veins
- Veins: Receive blood from venules, and carry it back to the atria of the heart
Cardiovascular System
Learning Objectives
By the end of this lesion, the learner should be able to:
- Describe the cardiovascular system
- Describe the structure and functions of the parts of the heart
- Describe the functions of different blood vessels
Cardiovascular System
- Consists of the heart and blood vessels:
- Heart is a hollow, cone-shaped, muscular pump; generates force to transport respiratory gases, nutrients, and wastes through body
- Blood vessels transport blood throughout the body:
- Arteries transport blood away from heart
- Veins transport blood toward heart
- Capillaries transport blood between arteries and veins, and perform nutrient, gas, and waste exchange
Overview of the Cardiovascular System
Two closed circuits (pathways) are included in Cardiovascular System:
-
- Pulmonary circuit: Carries oxygen-poor blood from heart to lungs, drops off carbon dioxide, picks up oxygen, flows back to heart
- Systemic circuit: Transports oxygen-rich blood and nutrients to body cells, removes wastes from cells, flows back to heart
Organization of the heart:
-
- Right side pumps to pulmonary circuit, blood returns to left side
- Left side pumps to systemic circuit, blood returns to right side
Structure of the Cardiovascular System
Structure of the Heart
Size and location of heart:
- Size of fist, varies with body size, averages 14 cm long,
9 cm wide - Located in inside thoracic cavity, in mediastinum, behind sternum, above diaphragm, near lungs
- Broad base lies beneath the 2nd rib
- Pointed apex lies at the 5th intercostal space
- Hollow, cone-shaped organ, containing double pump
- Divided into left and right halves
Blood Flow Through the Heart, Lungs, and Tissues
Blood Vessels
Blood vessels are organs of the cardiovascular system
Blood vessels form a closed circuit, transporting blood from heart to body cells (or lungs) and back to the heart
Types of blood vessels:
- Arteries: Carry blood away from the ventricles of the heart
- Arterioles: Receive blood from the arteries, and carry it to the capillaries
- Capillaries: Sites of exchange of substances between the blood and the body cells
- Venules: Receive blood from the capillaries, and conduct it to veins
- Veins: Receive blood from venules, and carry it back to the atria of the heart
Cardiovascular System
Learning Objectives
By the end of this lesion, the learner should be able to:
- Describe the cardiovascular system
- Describe the structure and functions of the parts of the heart
- Describe the functions of different blood vessels
Cardiovascular System
- Consists of the heart and blood vessels:
- Heart is a hollow, cone-shaped, muscular pump; generates force to transport respiratory gases, nutrients, and wastes through body
- Blood vessels transport blood throughout the body:
- Arteries transport blood away from heart
- Veins transport blood toward heart
- Capillaries transport blood between arteries and veins, and perform nutrient, gas, and waste exchange
Overview of the Cardiovascular System
Two closed circuits (pathways) are included in Cardiovascular System:
-
- Pulmonary circuit: Carries oxygen-poor blood from heart to lungs, drops off carbon dioxide, picks up oxygen, flows back to heart
- Systemic circuit: Transports oxygen-rich blood and nutrients to body cells, removes wastes from cells, flows back to heart
Organization of the heart:
-
- Right side pumps to pulmonary circuit, blood returns to left side
- Left side pumps to systemic circuit, blood returns to right side
Structure of the Cardiovascular System
Structure of the Heart
Size and location of heart:
- Size of fist, varies with body size, averages 14 cm long,
9 cm wide - Located in inside thoracic cavity, in mediastinum, behind sternum, above diaphragm, near lungs
- Broad base lies beneath the 2nd rib
- Pointed apex lies at the 5th intercostal space
- Hollow, cone-shaped organ, containing double pump
- Divided into left and right halves
Blood Flow Through the Heart, Lungs, and Tissues
Blood Vessels
Blood vessels are organs of the cardiovascular system
Blood vessels form a closed circuit, transporting blood from heart to body cells (or lungs) and back to the heart
Types of blood vessels:
- Arteries: Carry blood away from the ventricles of the heart
- Arterioles: Receive blood from the arteries, and carry it to the capillaries
- Capillaries: Sites of exchange of substances between the blood and the body cells
- Venules: Receive blood from the capillaries, and conduct it to veins
- Veins: Receive blood from venules, and carry it back to the atria of the heart
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