Cardiovascular

Blood Vessels, Heart, Blood

Carries nutrients, and oxygen, to cells, and waste and carbon dioxide away from cells

White blood cells

Its when Oxygen gets dropped of in cells, and waste is picked up

These nutrients and gases move by diffusion from an area of higher concentration to an area of lower concentration.

but in reverse– wastes and CO2 get dropped off, and oxygen gets picked up.

4

Upper Chambers (collect blood)

Ventricles: Lower Chambers (squeeze blood out of heart)

Are “doors” located between the atria and ventricles inside the heart ● Responsible for the lub-dub sound of your heart beat

Functions 1. Regulate the amount of blood that goes into and out of the heart 2. Prevents backwards flow

1- Veins 2- Capilaries 3-Arteries

1- Arteries: carry blood AWAY from the heart 2- Capillaries connect arteries to veins and is where gas exchange (C02 - 02) takes place 3- Veins: carry blood back TOWARDS the heart

Blood - is a type of connective tissue made up of 4

1) Red blood cells 2) White blood cells 3) Platelets 4) Plasma

RBC contain a protein called hemoglobin, which makes them red and allows oxygen to attach to them when you inhale. ● Does not contain a nucleus ( Made in bone marrow )

WBCs fight pathogens by engulfing (digesting) or releasing chemicals called antibodies to help destroy pathogens. ● They also keep you healthy by engulfing dead or damaged body cells. ● WBC are made in bone marrow and in the lymphatic system (lymph node)

Platelets are pieces of larger cells found in bone marrow that are released into the bloodstream. * Platelets produce chemicals that react with proteins to form a net. This net traps other blood cells to form a blood clot/scab.

Plasma - The fluid part of blood that is a mixture of water, CO 2 , minerals, proteins, salts, glucose, amino acids, hormones, and wastes like urea.

Atherosclerosis (Heart Disease)- Buildup of fats, cholesterol and other substance on the artery walls.

Aorta

Alveoli

Carry deoxyginated blood back to the heart

Diffusion