CK12 Life Science

Figure 16.2: Your body has four main types of tissue; nervous tissue, epithelial tissue, connective tissue, and muscle tissue. T ...

Muscle tissueis made up of cells that have filaments that move past each other and change the size of the cell. There are three ...

organ system. Together, your heart, blood, and blood vessels form yourcardiovascular system. Organ Systems Work Together Your bo ...

Table 16.1: (continued) Organ System Major Tissues and Organs Function Example Lymphatic Lymph nodes; lymph vessels Defense agai ...

Table 16.1: (continued) Organ System Major Tissues and Organs Function Example Integumentary Skin, hair, nails Protection from i ...

Table 16.1: (continued) Organ System Major Tissues and Organs Function Example Respiratory Trachea, lar- ynx, pharynx, lungs Del ...

Table 16.1: (continued) Organ System Major Tissues and Organs Function Example Immune Skin; bone marrow; spleen; white blood cel ...

and exhale more carbon dioxide, so your breathing rate increases. Thermoregulationis another example of negative feedback. When ...

Notmanyfeedbackmechanismsinthebodyarebasedonpositivefeedback. Positivefeedback speeds up the direction of change, which leads to ...

homeostasis The ability of the body to maintain a stable internal environment in the response to external changes. muscular tiss ...

Introduction Did you know that you see the largest organ in your body every day? You wash it, dry it, cover it up to stay warm o ...

Functions of Skin Your skin covers the entire outside of your body. Your skin is your body’s largest organ yet it is only about ...

Figure 16.6: Skin is made up of two layers, the epidermis on top, and the dermis below. The tissue below the dermis is called th ...

surface of the epidermis form a thin layer of flattened, dead cells. Although the top layer of epidermis is only about as thick ...

Oil Glands and Sweat Glands Glands and follicles open out into the epidermis, but they start in the dermis.Oil glands secrete an ...

Figure 16.8: The structure of fingernails is similar to toenails. Thefree edgeis the part of the nail that extends past the fing ...

otherwise travel to the lungs. Eyelashes shield eyes from dust and sunlight. Eyebrows stop salty sweat and rain from flowing int ...

Melanomas are difficult to treat, and potentially deadly tumors. The best way to avoid skin cancer is to cover up when outside i ...

Figure 16.11: Sewing the edges of a large cut together allows the body to repair the damaged cells and tissues, and heal the tea ...

The skin helps to cool the body in hot temperatures, and keep the body warm in cool temperatures. It also help you to sense you ...