BSC1005L - Circulatory System Diagram

Circulatory System

System that transports oxygen, nutrients, and removes waste.

Heart

Muscular pump controlled by electrical impulses.

Blood

Fluid that carries oxygen, CO2, nutrients, waste, hormones.

Arteries

Vessels that carry oxygenated blood away from the heart.

Veins

Vessels that carry deoxygenated blood toward the heart.

Capillaries

Microscopic vessels where gas and nutrient exchange occurs.

Right Atrium

Receives deoxygenated blood from the body.

Right Ventricle

Pumps deoxygenated blood to the lungs.

Left Atrium

Receives oxygenated blood from the lungs.

Left Ventricle

Pumps oxygenated blood to the entire body.

Heart Valves

Structures preventing backflow and ensuring one-way blood flow.

Systole

Phase where the heart contracts to pump blood.

Diastole

Phase where the heart relaxes and chambers refill.

Blood Pressure

Force of blood on vessel walls; measured as systolic/diastolic.

Hypertension

Chronically high blood pressure.

Hypotension

Abnormally low blood pressure.

Thermoregulation

Control of body temperature through blood vessel dilation/constriction.

Pulmonary Circuit

Blood flow from heart to lungs and back to heart.

Systemic Circuit

Blood flow from heart to body tissues and back.

Heart Attack

Blockage of blood flow to the heart, usually due to plaque or clots.

Superior vena cava

1

Right atrium

6

Right ventricle

8

Inferior vena cava

9

Tricuspid valve

7

Pulmonary valve

15

Aortic valve

13

Mitral valve

11

Aorta

2

Pulmonary artery

3

Pulmonary veins

5

Left artium

10

Left ventricle

12

Cardiac Muscle (Myocardium)

14

Cardiac muscle (Another Myocardium location)

14

Oxygen poor blood

1

Oxygen rich blood

3

What is the Septum?

It is the thick muscular wall between the two lower chambers.