Lymphatic System

1. Lymphatic System 1. Extra fluid (called lymph) is squeezed out of capillaries 2. Lymphatic capillaries pick up the fluid 3. Lymph (extra fluid) is taken to lymph nodes 4. Lymph nodes “clean” the lymph (which has dead cells, pathogens, and blood plasma) by lymphocytes (B and T cells) B cells are “markers” and T cells are destroyers. B and T cells are found in the spleen and T cells mature in the thymus 5. After the lymph is cleaned, it is taken to veins in the neck where it is distributed back into the cardiovascular system

2. After blood moves through the body, the blood enters the right atrium through the inferior and superior vena cava. The right atrium pumps the blood through the tricuspid valve into the right ventricle. The right ventricle pumps the blood through the pulmonary valve to the lungs. The blood moves from the lungs back into the left atrium. From there, it moves into the left ventricle through the mitral valve. From the left ventricle, it moves through the aortic valve into the aorta and out to the rest of the body.

3. Respiratory System • 1. Air enters nose or mouth • 2. Flows through pharynx (throat) 2 tubes, the esophagus leads to stomach and the other leads to lungs • 3. Flows past larynx (vocal cords) • 4. Trachea (windpipe) • 5. Then, trachea splits into two branches called bronchi • 6. Bronchus branches into smaller tubes called bronchioles • 7. Bronchioles branches to form tiny sacs called alveoli in the lungs