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Homeostasis is the internal stability or steady state maintained by the body.
Homeostasis is the internal stability or steady state maintained by the body.
Maintaining homeostasis is important because your tissues can only survive within a narrow range of conditions.
Maintaining homeostasis is important because your tissues can only survive within a narrow range of conditions.
The body’s thermostat is located in the brain.
It maintains a nearly constant temperature.
Two mechanisms that help to maintain constant temperature are shivering and sweating.
Hormones are chemical signals that help regulate body systems that contribute to homeostasis.
Hormones are carried to other parts of the body where they trigger particular responses.
Hormones are chemical signals that help regulate body systems that contribute to homeostasis.
Hormones are carried to other parts of the body where they trigger particular responses.
Interstitial fluid is an aqueous solution that fills the gaps between cells in a tissue.
Interstitial fluid is an aqueous solution that fills the gaps between cells in a tissue.
The circulatory, respiratory, digestive and excretory systems in particular perform a great deal of chemical exchange with the rest of the body.
The circulatory, respiratory, digestive and excretory systems in particular perform a great deal of chemical exchange with the rest of the body.
Cells must be bathed in interstitial fluids for chemical exchange to occur.
Cells must be bathed in interstitial fluids for chemical exchange to occur.
The integumentary system is the body’s outer covering that has the important task of physically separating the body from the external environment.
The integumentary system is the body’s outer covering that has the important task of physically separating the body from the external environment.
The epidermis: The outermost layer of skin, is made mostly of dead epithelial cells that continually flake off and fall off.
The dermis: The skin layer that lies beneath and supports the epidermis.
The hypodermis: A tissue layer below the dermis, containing a kind of connective tissue called adipose tissue, which includes fat-storing cells and blood vessels.
The epidermis: The outermost layer of skin, is made mostly of dead epithelial cells that continually flake off and fall off.
The dermis: The skin layer that lies beneath and supports the epidermis.
The hypodermis: A tissue layer below the dermis, containing a kind of connective tissue called adipose tissue, which includes fat-storing cells and blood vessels.
Keratin:
Protein
Provide strength and protection
Not affected by sunlight.
Melanin:
Pigment
Provide skin color and UV protection.
Increases with sun exposure.
Keratin:
Protein
Provide strength and protection
Not affected by sunlight.
Melanin:
Pigment
Provide skin color and UV protection.
Increases with sun exposure.
The follicle cells produce and deposit keratin at the base of each hair shaft, causing the hair to grow.
The follicle cells produce and deposit keratin at the base of each hair shaft, causing the hair to grow.
Sweat and shiver to maintain a steady temperature.
Removal of wastes (sweat)
Keratin is waterproof (prevents dehydration).
Sweat and shiver to maintain a steady temperature.
Removal of wastes (sweat)
Keratin is waterproof (prevents dehydration).