19. Cardiovascular System: Blood Vessels

Pathway of blood through the pulmonary circuit

Circulatory Pathways

Pulmonary and Systemic Circulation

Veins of the body - part 2

Hepatic Portal Circulation 

Hepatic portal system

 Elastic arteries are thick-walled arteries near the heart. These arteries are the largest in diameter. Elastic arteries act as pressure reservoirs; they expand and contract as blood is ejected from the heart. Muscular arteries (or distributing arteries) deliver blood to specific regions of the body. Arterioles are the smallest of the arteries; blood flows directly from the arterioles into capillary beds.  

 Blood flows directly from __________ into capillary beds. 

 Freshly oxygenated blood flows from the lungs to the left atrium via the pulmonary veins.  

 Blood flows from the lungs to the __________ via the __________. 

The Circulatory System Part 1: The Heart

Pulmonary and Systemic Circulations

 right ventricle and flows directly to the aorta 

 The movement of oxygen-poor blood from the right ventricle to the lungs is part of the pulmonary circuit. 

 right ventricle and flows directly to the lungs 

 right atrium and flows directly to the lungs 

 right atrium and flows directly to the left ventricle 

 left ventricle and flows directly to the lungs 

 During pulmonary circulation, blood leaves the __________. 

Circulatory System , Pulmonary Circulation

 The flow of blood from the left ventricle to the right atrium is called the systemic circulation. 

 The flow of blood from the left ventricle to the right atrium is called the __________. 

Veins of the body - part 1

Circulatory System | Arteries & Veins of the Upper & Lower Limbs | Wire Man Model

Major Arteries of the Body

The Circulatory System : Blood Vessels

 elastic lamina on both sides of the tunica media in muscular arteries 

 The elastic lamina on both sides of the tunica media in muscular arteries does not determine the amount of blood flow through the capillary beds. 

 Elastic arteries are relatively inactive in vasoconstriction, and this does not determine the amount of blood flow through the capillary beds. 

 number of elastic fibers in conducting arteries 

 The number of elastic fibers in conducting arteries does not determine the amount of blood flow through the capillary beds. 

 The minute-to-minute blood flow through the capillary beds is determined by the __________. 

Arteries of the body - part 1

 Substances that are absorbed into the capillaries surrounding the GI tract will be transported to the liver via the hepatic portal system. 

 The hepatic portal system collects blood from the __________ and then routes it to the __________.  

Hepatic Portal Circulation

 The coronary artery branches from the base of the aorta. 

 Blood services the myocardium of the heart by coronary vessels that originate from the __________. 

 The cuff of smooth muscle fibers surrounding the root of each true capillary at the metarteriole that acts as a valve to regulate blood flow into the capillary is a precapillary sphincter. 

 Which of the following regulates blood flow at the entrance to each true capillary? 

Arteries of the body - part 2

 The celiac trunk is a large, unpaired artery that branches into the hepatic, left gastric, and splenic arteries to supply much of the upper abdomen. 

 Which of the following abdominal arteries branches to form the common hepatic artery, left gastric artery, and splenic artery? 

Portal Venous Systems, Hepatic Portal System and Liver Functions

 left ventricle and flows directly to the aorta 

 lungs and flows directly to the left atrium 

 The movement of oxygen-rich blood from the left ventricle to the aorta is part of the systemic circuit. 

 right ventricle and goes directly to the aorta 

 During systemic circulation, blood leaves the __________. 

 Precapillary sphincters act as valves to regulate blood flow through capillary beds. Not all capillary beds are perfused with blood on a continuous basis. During exercise the capillary beds in the muscles are perfused with blood, while capillary beds around the GI tract are closed off to allow for sufficient blood flow to the muscles. The capillary beds around the GI tract are open during a meal and closed between meals, during exercise, and during sleep (which is also between meals). 

 When would the capillary beds surrounding the gastrointestinal organs be open? 

 The inferior vena cava returns blood from all body regions below the diaphragm to the heart. The superior vena cava returns blood from all areas superior to the diaphragm, except the heart wall, to the heart.  

 Blood from the brain is returned to the heart via the __________.  

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1. Introduction to A&P

2. Chemistry

3. Cells

4. Tissues

5. Integumentary System

6. Bones + Skeletal Tissues

7. Skeletal System

8. Joints

9. Muscles and Muscle Tissue

10. Muscular System

11. Nervous Tissue

12. Central Nervous System

13. Peripheral Nervous System

14. Autonomic Nervous System

15. Special Senses

16. Endocrine System

17. Blood

18. Cardiovascular System: the Heart

20. Lymphatic System

21. Immune System

22. Respiratory System

23. Digestive System

24. Nutrition, Metabolism, Energy Balance

25. Urinary System