Levels of organization, Circulatory System

blood vessels

(arteries, capillaries, and veins) tubes that carry blood throughout the body

cells

basic unit of structure and function within the human body

nerve tissue

carries impluses back and forth to the brain from the body

Arteries

carry blood that has oxygen and nutrients AWAY from the heart to all parts of the body

red blood cells

carry oxygen to all parts of the body

Veins

carry waste products from all parts of the body back to the heart

Blood

composed of red blood cells, white blood cells, platelets, and plasma

connective tissue

connects all parts of the body and provides support ( tendons, ligaments)

muscle tissue

contracts and shortens making body parts move

epithelial tissue

covers the surface of the body both inside and outside.

white blood cells

fight and kills germs that may enter bloodstream

platelets

form scabs to stop bleeding

tissues

group of specialized cells that work together to perform same function

organs

group of two or more different types of tissue that work together to perform a specific function.

systems

group of two or more organs that work together to perform a specific function.

plasma

liquid part of blood

Circulatory System

main function is to transport blood to all parts of the body so that gases, nutrients, and waste products are transported to and from the cells

Heart

major organ of circulatory system; causes blood to flwo through the body by its pumping action

nerve cells, blood cells, bone cells

types of animal cells

guard cells, xylem cells, phloem cells

types of plant cells

xylem tissue, phloem tissue

types of tissues in plants

Capillaries

very small vessels where gas exchange takes place between blood and cells