Grade 10 Biology Review - Circulatory System

Label the Circulatory System

Heart chamber: Atria

-blood receiving chambers (up)

-low blood pressure

-thin-walled

Heart chamber: Ventricles

-pump blood into circluation via arteries

-high blood pressure

-thick-walled

Septum

muscular wall that separates the heart

Valves

atriventricular valves and tricuspid valves

prevent blood from flowing the wrong way into the heart

How does the heart pump blood?

1. deoxygenated blood enters through superior and inferior vena cava

2. right atrium —> right ventricle

3. right venticle —> pulmonary artery

4. pulmonary artery brings artery brings blood to the lungs

5. in the lungs, blood releases CO2 and picks up oxygen

6. pulmonary vein bring oxygen-rich blood back to the heart

7. left atrium —> left ventricle

8. left ventricle —> aorta

9. Aorta —> capillaries

10. Capillaries bring blood and nutrients to tissues

Epithelial Tissue

lines inside and outside of heart to protect it from friction

mucus keeps components lubricated

Nervous tissue

Regulates heartbeat and contriction and dilation of blood vessels

Sympathetic: heart beat increases, fight or flight

Parasympathetic: heart beat decreases, rest and digest

Baroreceptors: regulates blood pressure

Mucle tissue

Cardiac muscle: helps heart contract as one unit

Artery

Carry oxygeb rich blood away from heart.

The pulmonary artery brings Deoxygenated blood tho.

Veins

Bring Deoxygenated blood to the heart. P. Vein brings oxygenated blood