Lb 2 Exm Flashcards
Forms the external body covering and protects deeper tissues from injury. Synthesizes, vitamin D, and houses cutaneous receptors (pain and pressure) and sweat and oil glands.
Integumentary system
Protects and supports body organs and provides a framework of the muscles used to cause movement. Blood cells are formed within bones. Bone stores minerals.
Skeletal system
Allows manipulation of the environment, local motion, and facial expression. Maintains posture and produces heat.
Muscular system
As the fast acting control, system of the body, in response to internal and external changes by activating appropriate muscles and glands.
Nervous system
Glands secrete hormones that regulate processes, such as growth, reproduction, and nutrient use (metabolism) by body cells
Endocrine system
Blood vessels transport blood, which carries oxygen, carbon dioxide, nutrients, wastes, etc. The heart pumps blood.
Cardiovascular system
Picks up fluid leaked from blood vessels and returns at to blood. Disposes of debris in the lymphatic stream. House is white blood cells (lymphocytes) involved in immunity. The immune response mounts the attack against foreign substances within the body
Lymphatic system/immunity
Keeps blood constantly supplied with oxygen and removes carbon dioxide. The gaseous exchange occur through the walls of the air sacks of the lungs.
Respiratory system
Breaks down food into absorbable units that enter the blood for distribution to the body cells. Indigestible food stuffs are eliminated as feces.
Digestive system
Eliminates nitrogenates waste from the body. Regulates, water, electrolyte, and acid base balance of the blood.
Urinary system
Overall function is production of offspring. Testes produce sperm and male sex hormone, and male ducts and glands aid in delivery of sperm to the female reproductive tract
Male reproductive system
Ovaries produce eggs and female sex hormones. The remaining female structures trim as sites for fertilization and development of the fetus. Mammary glands of female breast produce milk to nourish the newborn
Female reproductive system
Layers of the epidermis from superficial to deep
stratum corneum, stratum lucidum (found only in thick skin), stratum granulosum, stratum spinosum (largest), stratum basale.
Most common cells in epidermis are
Keratinocytes
Dendritic cells
Immunity
Melanocytes
Melanin
Touch receptors
Merkel cells, tactile cells, or tactile discs
Deepest layer composed of single layer of cells, actively dividing keratinocytes plus Merkel cells and melanocytes scattered throughout. Undergoing mitosis
Stratum basale
several layers of keratinocytes with cytoplasm shrinking. Largest layer
Stratum spinosum
3-5 layers, nulcei and organelles degenerate as cells begin to die, keratin accumulates in cytoplasm. Very dark
Stratum granulosum
only in THICK SKIN, 2-5 layers
of dead cells, appears CLEAR
Stratum lucidum
dead cells that slough off
Stratum corneum
Layers of the dermis
Papillary layer-20%, reticular layer- 80%
Which layer in the dermis is made of loose areolar connective tissue?
Papillary layer
