Chap 7. Structure/function of human body Flashcards
What are the two major divisions of the skeleton and what are they made of?
Appendicular- shoulder girdle, arms, wrists, hands, pelvic girdle, legs, ankles, and feet
Axial- skull, vertebral column, thorax, face
What is the cardiac muscle?
The pumping contractions and relaxations of the muscle.
What is the largest organ of the body?
Skin
What are the three layers of skin?
Epidermis, dermis, and subcutaneous
Describe epidermis
The outer layer of skin. Consists of 5 layers, contains no blood supply or nerves. The outer most layer is composed of cells that have died from environmental exposure and are shed daily
Describe dermis
The second layer of skin, which contains involuntary muscles, blood vessels, nerves, hair follicles, sweat and oil glands
Describe subcutaneous
The inner most layer of skin containing fatty and connective tissue
What is sudoriferous glands?
Sweat glands
What is sebaceous glands
Oil
What are sphincter muscles?
Circular muscle that controls the opening and closing of passage way
What is the hearts main function?
Pump enough blood at high enough pressure to supply every part of the body.
What is endocardium?
Smooth layer that lines inside of heart
Myocardium?
Thick layer of muscle tissue that performs pumping
Pericardium?
Sac like membrane that surrounds the heart
What is epicardium?
The outer layer of heart
