Digestive, Circulatory, and Lymphatic Systems

circulatory system the transport system that uses blood to carry nutrients, oxygen, etc. to the cells of the body and carries wastes away from the cells

heart a muscular organ that pumps blood throughout the body

atria/atrium the upper chambers of each side of the heart

ventricles the lower chambers of each side of the heart

valve structures found in the heart that keep the blood flowing forward

arteries blood vessels that carry blood away from the heart (with oxygen) (shown in red)

veins blood vessels that carry blood toward the heart (without oxygen) (shown in blue)

capillaries tiny blood vessels that connect the arteries and veins they exchange gases and nutrients between the blood and body cells the smallest blood vessels

plasma a yellowish fluid that is mostly water in which blood cells are suspended; it also contains dissolved nutrients, minerals, salts, and gases

red blood cells blood cells that carry oxygen to the cells of the body and carry carbon dioxide from cells back to the lungs

hemoglobin a molecule that carries oxygen and carbon dioxide

white blood cells the type of blood cells that help the body fight disease by attacking invading microorganisms and making antibodies to fight infection

lymphocyte

platelets cell fragments that help form blood clots to stop bleeding

Digestive System Name the organ system that: breaks down food into simpler molecules that can be used by the body

Digestive System Which system includes the following organs? mouth esophagus stomach small intestine large intestine rectum liver gall bladder pancreas

mechanical digestion the process where food is physically broken down into smaller pieces

chemical digestion the process where liquids break down food molecules into simpler substances using enzymes and acids

enzyme a protein that speeds up a chemical reaction

esophagus a muscular tube that connects the mouth to the stomach

stomach a muscular bag-like organ that carries out both mechanical and chemical digestion using hydrochloric acid

chyme food from the stomach that has been changed into a thin, watery liquid that moves through the small intestine

small intestine a long, muscular tube where the body absorbs nutrients from food

villi finger-like projections in the small intestine; help many nutrients to be absorbed

pancreas a gland that releases digestive enzymes and other chemicals into the small intestine

liver an organ that makes bile, a liquid that helps to break down fat (bile is stored in the gall bladder)

large intestine an organ of the digestive and excretory systems that absorbs water from undigested material and helps remove solid wastes from the body

What are the 3 types of muscle tissue? Skeletal muscles Smooth muscles Cardiac muscles