Circulatory System Grade 8

List all steps of blood circulation

1. Superior or Inferior Vena Cava, 2. Right Atrium which then goes thorugh Tricupsid Valve and Pulmonary Valve. 3. Right Ventricle. 4. Pulmonary Artery. 5. To go to the lung or pulmonary Veins. 6 Left Atrium, Aortic Valve, Mitral Valve, 7. Left Ventricle 8. Aorta to go to the rest of the body.

Main function of the circulatory system

1. Carry blood that is rich in oxygen, nutrients, hormones, and immune fighters from the heart to all parts of the body.
   2. Collect wastes and deposit them where they will be carried out of the body

The 3 main functions of blood

Transportation, Regulation Protection

Red blood cells

Has a protein called hemoglobin which carries oxygen molecules
Carries the waste by picking up carbon dioxide to be removed.

Platelets

Helps heal and clot blood.

White blood cells

Protects the body against infection and disease, makes antibodies

Plasma

A fluid that the cells suspend in.

Appearance, origin, amount, relative size of red blood cells

Red disk shaped cells, Produced in the bone marrow/erythropoiesis, 4.5 million cells (45%), 7-8 micrometers in diameter, no nucleuss

List the secondary name, appearance, origin, amount in blood, and relative size of white blood cells.

Leukocytes, can be round or oval shaped, colorless, origin is limphoid organs, 4000-11000 cells per microliter of blood, 12-17 micrometers has nucleus

list secondary name, appearance, origin, amount in blood, relative size of platelets

thrombocytesm small irregular shape, colorless, very light in color, orgiin fragments of mega kargocyte, 150,000-450,000 cells per microliter of blood, 2-3 micrometers, no nucleus

What are thye 3 blood vessels

Arteries, Veins, Capillaries

What do arteries do and what are their walls

Arteries carry oxygenated blood away from the heart to the rest of the body. Thick walls

What do veins do and their walls?

Veins carry oxygen-depleted blood back to the heart. Thin walls thinner than arteries

What do capillaries do and their walls?

Tiny blood vessels that connect arteries to veins, thinnest walls of the blood vessels

What is the atrium?

Upper chamber where blood enters the ventricles

What are ventricles?

One of 2 large chambers towards the bottom of the heard

What do valves do

Valves seperate the left and right side of the heart and keeps oxygenated bllod seperated from deoxygenated blood.