excercise 3- The cell that surround us.docx - Type of cell...

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Type of cell Image Example Basic characteristics Basic functions Eukaryote: animal Skin Cells Skin cells grow and divide in the basement membrane. From here, the new cells get pushed up into the epidermis. Your skin is full of nerve endings that help you sense the world around you. Your skin emits sweat when you're hot. Sweat evaporating from your skin cools you. Eukaryote: animal Red blood Cells The mature human red blood cell is small, round, and biconcave; the cell is flexible and assumes a bell shape as it passes through extremely small blood vessels. It is covered with a membrane composed of lipids and proteins, lacks a nucleus, and contains hemoglobin The function of the red cell and its hemoglobin is to carry oxygen from the lungs or gills to all the body tissues and to carry carbon dioxide Eukaryote: animal Bone Cells There are two categories of bone cells. Osteoclasts are in the first category. They resorb (dissolve) the bone. The other category is the osteoblast family, which consists of osteoblasts that form bone Osteoblast plays a central role in controlling osteoclastic function. Osteoblasts and not osteoclasts have specific surface receptors for agents, which stimulate bone resorption. Eukaryote: animal Muscle Cells There are 3 types of muscle cells in the human body. Cardiac, skeletal, and smooth.

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