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Angiosperm

Flowering plant whose seed are enclosed in a fruit and are the most complex and highley adaptable plants on earth.

Bile

Chemical produced by the liver and stored in the gallbladder that breaks fat into small droplets.

Cardiac Muscle

Involunary straited muscle that is only found in the heart and conducts elerical impulses that produce rhythmic contractions.

Dormacy

In seed, the period of inactivity allowing then to survive conditions unfavorable for growth.

Ectotherm

Animal with a body temperature regulater by its environment (example: fish, amphibians, reptiles)

Feather

Lightweight, external covering of birds, used for flight and insulation.

Hemoglobin

iron-containing molecule of red blood cells that transport oxygen and some carbon dioxide.

Lateral-line System

Fluid-filled canals along sides of fish that serve as sensory receptors, enabling detection of prey and navigation in the dark.

Melanin

Cell pigment formed by the inner epidermal skin layer; colors the skin and helps prtect against ultroviolet radiation.

Pancreas

Gland that produces both hormones and digestive enzymes, pancreatic juice is alkaline which stops further digestive action of pepsin.

Placental Mammal

mammal that carries its young inside the uterus untill ready for birth.

Sepal

Leaf-like structures at the base of a flower, protects the flower while in the bud.

Stamen

In flowers, the male reproductive structure consisting of an anther and attaching hilament.

Thyroid Gland

Produces thyroxin a hormonme that regulates metabolsim and growth and calcitonin a hormone that regulate calciuim and phosphate levels.

Tropism

Irreversible, responsive movement in plants toward or away from such external stinuli as light or gravity.

Vein

Large blood vessels that return blood from the tissues back to the heart, contain one-way valves to prevent backflow of blood.

Voluntary Muscle

Muscle whose contractions are under consious conrtol (example: Skeletal muscle)

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