basic structure and cell function
basic unit of all living things-as a basic functional unit, it is responsible for carrying out all life processes
cells
the normal process of cell reproduction in human tissues that occurs when the cell divides into two identical cells called daughter cells
mitosis
a collection of similar cells that perform a particular function
Tissue
largest organ of the body, first line of defense against infection and water loss, regulates temperature, perceives sensations, produces vitamin D, has absorption capabilities
integumentary system
tiny thin walled blood vessels that connect the smaller arteries to the veins-bring nutrients to the cells and carry away waste
capillaries
colorless jellylike substance in which nutrient such as proteins, fats, carbohydrates, mineral salts and water are present-
protoplasm
a chemical process that takes place in living organisms
metabolism
protective lining on cavities of the body and surfaces of organs- examples skin, mucous membranes, the lining of the heart, digestive and respiratory organs and the glands
epithelial tissue
carries messages through the central nervous system, controls and coordinates all bodily functions
nervous system
whitish cords made up of bundles of nerve fibers held together by connective tissue through which impulses are transmitted
nerves
takes in nutrients breaks them down and creates energy for the cell
mitochondria
favorable conditions for cell health include
adequate supply of nutrients, oxygen, water and the ability to eliminate waste
carries messages through the central nervous system to control and coordinate all bodily functions
Nerve Tissue
protects the body from disease by developing resistances and destroying disease causing toxins, foreign material and bacteria
immune/lymphatic system
the deepest layer of skin located directly below the epidermis and dermis
subcutaneous tissue
found within the nucleus of the cell, this is a fluid that contains proteins and a very important acid known as deoxyribonucleic acid (DNA)
nucleoplasm
what are some unfavorable conditions for cell health
toxins, disease and injury
supports protects and binds together other tissues of the body examples: bone cartilage ligaments tendons fascia blood and fat (adipose tissue)
connective tissue
forms the physical foundation of the body-consists of bones moveable and immovable joints
skeletal system
microscopic exocrine glands in the skin that produce and secrete sebum
sebaceous glands
the part of the cell that encloses the protoplasm and permits soluble substances to enter and leave
cell membrane
blood is made of up what percentage of water
83%
contracts and moves various parts of the body
muscle tissue
controls the steady delivery of blood thru the body-works with lymphatic channels
circulatory system
thick walled muscular flexible tubes that carry oxygenated blood from the heart to the capillaries throughout the body
arteries