Ch 7 Systems & Cells

Question 1

ecosystem

Answer 1

a biological community of interacting organisms and their physical environment

Question 2

organism

Answer 2

an individual plant or single-celled life form

Question 3

12 organ systems

Answer 3

integumentary - skin, hair, nails, sweat glands
skeletal - bones, ligaments, cartilage
muscular - cardiac muscles, smooth muscles
nervous - brain, spinal cord
endocrine - hypothalamus, pineal gland, pituitary gland, thyroid gland, liver, pancreas, kidneys, adrenal glands
circulatory - heart, blood, blood vessels
immune - thymus, lymph nodes, spleen, leukocytes
lymphatic - lymph, lymph vessels and lymph nodes
respiratory - nasal cavity, trachea, lungs
digestive - oral cavity, esophagus, stomach, intestines, liver, gallbladder, pancreas, bile duct
urinary - kidneys, bladder, urethra
reproductive

Question 4

pH

Answer 4

a measure of hydrogen ion concentration which determines the acidity or alkalinity of a solution

Question 5

molecule

Answer 5

a group of atoms bound together that is a functional unit for chemical reactions

Question 6

atom

Answer 6

smallest unit of ordinary matter that forms a chemical element

Question 7

organ

Answer 7

self contained part of the body that has a specific function

made up of two or more tissues

Question 8

tissues

Answer 8

made up of large groups of similar cells that share common functions

Question 9

fascia

Answer 9

a band or sheet of connective tissue that encloses or stabilizes other structures such as muscle. surrounds and holds every