Circulatory System 2: Module 9

The take blood away from the heart

This is the site of gas exchange, and is the smallest functional unit

Carries blood towards the heart.

1. deoxegenated blood enters the right atrium/ventricle, and leaves via pulmonary artery
2. The artery then gets smaller and turns into arterioles which eventually turn into cappilaries

3. At the cappillaries carbon dioxide is removed from the blood and oxygen diffuses into the blood.

4. The blood then enters venules and turns into veins which then travel to the pulmonary vein yippie!

1. The oxegenated blood enters the left atrium/ventricle and leaves through the aorta.

2. The artieries then turn into arterioles which turn into cappilaries

3. The cappillaries deliver oxegen and nutrient to the cells, and pick up carbon dioxide.

4. The deoxegenated blood then travels through venules, then veins, then to the inferior/superior vena cava and into the right atrium

TAHDAH!!!! :D:D:D

1. each human being has aprox. 5L of blood in them

1. Veins 70% - capacitance vessels hold the most blood

2. Arteries 10%
3. heart and lungs 15%
4. Capillaries 5%

Arteries have the highest blood velocity since they are directly beside the heart, and highest pressure. However, they have the lowest cross sectional unit

They have the 2nd highest blood pressure, 2nd highest blood velocity, and low cross sectional unit (the same as venules)

Capillaries have the lowest blood velocity, lower blood pressure than arterioles. BUT they have the highest cross sectional unit

They have lower blood pressure than capillaries, and lower blood velocity than venules. Venules have the same amount of cross sectional area as arterioles

The veins have lower blood velocity than venules, but they have the lowest blood pressure. They have the lowest cross sectional unit

1.arteries
2.arterioles
3.capillaries
4.venules
5.Veins

**In terms of blood pressure just think of pulmonary circulation :) basically just know that veins have the lowest blood pressure and arteries have the higest blood pressure

1. Arteries
2. Aterioles
3.Venules
4. Veins
5. Capillaries

*Just know that arteries have the highest blood velocity, and capillaries have the lowst blood velocity

The blood velocity begins to increase as it reaches the venuels

This is the force that moves blood through the entire circulatory system

Resistance is the result of blood dragging on the walls of vessels.