Internal medium of organism презентация

Internal medium of organism

You will: - describe the lymphatic system and the relationship between the blood and tissue fluid and lymph.

Key terms Lymph – fluid that circulates through lymphatic system; Lymphatic system – network of tissues and organs that help the body to get rid of toxins, waste and other unwanted materials; Tissue fluid – fluid between cells; Blood - a body fluid which delivers needed substances to organs; Plasma – the liquid part of blood, which contains water and nutrients.

Internal medium (IM) of organism IM – all the fluids of a human It includes blood, lymph, tissue fluid and serebrospinal fluid Blood is inside blood vessels and lymph is inside lymphatic vessels Tissue fluid is between cells Serebrospinal fluid is in CNS

BLOOD Blood is a connective tissue It consist of 45% blood cells and 55% plasma

Functions of the Blood Nutrient Transport Hormone Transport Homeostasis Immune response Clotting

Plasma constitutes 55% of the blood

Plasma proteins There are more than 70 different types of plasma proteins Examples: Fibrinogen is involved in blood clotting Albumin regulates water level Globulins participate in the structure of antibodies and protects body from pathogens

Lymph The fluid that has diffused from blood and has not been reabsorbed by the blood capillaries forms tissue fluid Once fluid enters the lymphatic vessels, it is called lymph

Functions of Lymphatic system Lymphatic vessels take up excess tissue fluid and return it to the blood stream in VEINS Lacteals (lymph vessels), absorb fats at the intestinal villi and transport them to the blood stream helps to defend against disease (immunity)

Lymph nodes Lymph nodes are involved in both blood production and body defense by capturing microbes In the event of major infection, the lymph nodes can become enlarged

Terminology