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Warm-Up: January 21, 2011. Which of these biomes is closest to the equator? Taiga Desert Savanna temperate deciduous forest. Activator. Has a doctor ever felt your neck or jaw when you were sick. What is the doctor checking for. EQ - How do the functions of organ systems interact?. TWL - PowerPoint PPT Presentation
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Warm-Up: January 21, 2011
Which of these biomes is closest to the equator?
a. Taigab. Desertc. Savannad. temperate deciduous forest
Activator
• Has a doctor ever felt your neck or jaw when you were sick. What is the doctor checking for.
EQ - How do the functions of organ systems interact?
TWL
Today I will learn about the lymphatic system because
it helps your body fight pathogens.
Integumentary System
Integumentary System• Is made up of the skin, hair,
and nails.
• Function: it protects your body and helps maintain homeostasis.
Skin• Four functions• Keeps water in the body and
keeps foreign particles out of the body.
• Helps you touch the outside world with nerve endings in the skin
• Helps regulate body temperature through sweat glands
• Helps get rid of waste
Layers of Skin• Epidermis: the outermost
layer of the skin.• Dermis: the thicker layer of
skin that lines beneath the epidermis.
Hair and Nails• Hair: helps protect the skin
from ultraviolet light. It also helps keep particles out of your eyes and nose.
• Nails protect the tips of your fingers and toes.
Skin Injuries• Skin cancer: can be caused
by damage to the genetic material in skin cells.
• Skin may also be affected by hormones that cause oil glands to produce too much oil. The oil, dead skin cells, and bacteria can clog the hair follicles.
Lymphatic System
• The lymphatic system is the group of vessels, organs, and tissues that collects excess fluid and returns it to the blood.
• The lymphatic system also helps your body fight pathogens.
LYMPH CAPILLARIES
• Lymph capillaries absorb some of the fluid and particles from between cells in the body.
• The fluid and particles absorbed into lymph capillaries are called lymph
LYMPHATIC VESSELS
• Lymphatic vessels drain the lymph into large veins in the neck.
• This returns the fluid to the cardiovascular system.
BONE MARROW• Bone marrow is the soft tissue inside bones that makes red and white blood cells.
• White blood cells called lymphocytes help fight infection.
LYMPH NODES
•Lymph nodes are small masses of tissue that remove pathogens and dead cells from the lymph.
THYMUS
•Thymus is a gland that produces T cells that are ready to fight infection.
SPLEEN
• The spleen may release lymphocytes into the bloodstream when there is an infection.
• The spleen also monitors, stores, and destroys old blood cells
TONSILS
• The tonsils are lymphatic tissue at the back of the mouth.
• Tonsils help defend the body against infection by trapping pathogens