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Skeletal system/etc.
Term | Definition |
---|---|
TERM Skeletal System | all of the bones in the body, together with the ligaments and cartiliage |
TERM Skeleton | all of the bones in an organism, provides structure, support and protection |
TERM Joint | area where two bones meet. most provide for movement, include fluid or lubrication and cartilage for protection. Ligaments holds bones together |
TERM Cartilage | smooth, slippery substance. provides cushion, protection for bones in joints, prevents the bones from wearing against each other, provides some structure in nose and ear, provides flexibility in rib-cage |
TERM Ligament | strong connective tissue fibers that hold bones together |
TERM Tendon | strong connective tissue fibers that hold muscle to bone |
TERM Marrow | squishy, fatty tissues found in centers of long bones, primary site of blood cell production |
FACT | There are 206 bones in the adult skeletal system |
FACT 2 | children at young ages have more than 300 bones in there skeletal system |
The Skeletal System: | makes blood cells, shapes and supports the body, moves the body with the muscular system, protects organs inside the body, stores fat cells, calcium, and minerals |
Bones: | *206, *minerals, protein, water, living material,* four layers: periosteum-compact bone-spongy bone-marrow, * four shapes: flat-long-short-irregular |
Cartilage: | *flexible tissue, *protects bones, *shapes body, *gives flexibility |
Ligaments: | *stretchy connective tissue, *Connects bones to bones |
Joints: | *bones meet, *fixed, *gliding, *ball and socket, *pivoting, *hinge |
ball and socket | hips, shoulders |
hinge | elbows, knees |
pivot | head, arms |
immovable | skull |
gliding | fingers, spine |
The inside of a bone: | Periosteum (outside), Compact bone (just below periosteum), Spongy bone (inside compact), Marrow (inside spongy) |
FACT3 | the skeleton supports the weight of the body, the bones of the skeleton fit together to allow movement |
skeletal/majors | major organs: bones of the body, Major function: support, protection of the organs |
muscular/majors | major organs: muscles of the body, Major function: movement |
circulatory/majors | major organs: heart, arteries, veins, capillaries, blood, Major functions: carry food and oxygen to cells, return waste products for excretion by kidneys |
respiratory/majors | major organs: nasal passages, trachea, bronchi, lungs, Major functions: exchange of gases like CO2, O2 |
digestive/majors | major organs: esophagus, stomach, small intestine, large intestine, etc., Major functions:break foods down so that they may be absorbed by the blood |
excretory/majors | major organs: kidneys, bladder, ureters, urethra, Major functions: get rid of waste |
nervous/majors | major organs: brain, spinal cord, nerves, senses. Major functions: body control |
endocrine/majors | major organs: pituitary, thyroid, parathyroid, thymus, adrenals, Major functions: maintain a healthy balance for growth, metabolism, and reproductions |
Body organization: | CELLS work together to form TISSUES (bones, muscles, nerves) work together to form ORGANS (brain, stomach, heart) work together to form SYSTEMS ( skeletal, muscular, circulatory, digestive, reproductive, respiratory, excretory, endocrine, nervous) |
Epidermis: | top layer of skin you can see that is made up of dead skin cells. Protects body and helps keep in moisture, and is constantly growing. |
Dermis | the layer that is underneath the epidermis. its composed entirely out of living cells, and consists of bundles of tough fibers which gives our skin its elasticity, firmness, and strength.blood vessels feed vile nutrients to these areas |
whats in the epidermis | pores, sebaceous glands |
whats in the dermis | sweat glands, hair follicles, pain detector, heat sensor, nerve ending, cold sensor |