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vocan no. 9 through 12

ectotherm

am animal who cannot control their internal body temperature and has to rely on their surroundings for heat

Endotherm

an animal who can produce and regulate its own body heat and internal temperature

swim bladder

a gas filled sac inside fish that helps to stabalize them at different depths

atrai/atrium

the upper chambers of the heart

ventricle

the lower chambers of the heart

placenta

an organ that holds the developing fetus and passes materials between it and the mother

mammary glands

glands that produce milk to feed their young

gestation period

the period while the fetus is developing in the mother, a.k.a. pregnancy

diaphragm

the large muscle below the lungs that helps pull air into and push air out of the lungs

chordate

an animal in the phylum chordata that has a notochord, or spinal chord

radula

teeth that mollusks use to scrape food off of surfaces

exoskeleton

a hard outer shell protecting the soft innards of an invertabrate

molting

the shedding of an exoskeleton so they soft body of the invertabrate can grow and expand

metamorphisis

a process when the animals body undergoes dramatic changes during its lifestyle

antennae

an appendage on the head of some animals that contain sense organs

pupa

the second stage of complete metamorphisis when the insect is enclosed by a covering as it transforms from a larva to an adult

nymph

the second stage of gradula metamorphisis in which the organism is a smaller version that resembles the adult

thorax

the middle section of an insect that contains all of the appendages

abdomen

the last segment of an insect that contains most of the internal organs

water vascular system

a system of fluid filled tubes that are inside the body of an ecniderm.....also helps it the echniderm move

endoskeleton

an internal skeleton

organ

a collection of tissues that carry out a specialized function in the body

vertabrate

an animal with a backbone

invertabrate

an animal that does not have a backbone

assymetry

something that is not symmetrical or does not have any lines of symmetry

radial symmetry

the quality of having many lines of symmetry all passing through a central point

bilateral symmetry

body plan in which only a single, imaginary line can divide the body into two equal halves; characteristic of worms, arthropods, and chordates

cnidarian

radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures

polyp

the cnidarian body plan with a vase shape and is usually adapted for life on an underwater surface

medusa

a cnidarian body plan of a bowl made for a free swimming life

regeneration

the abillity to regrow body parts

xylem

vascular tissue that transports water and nutrients from the roots to other cells

phloem

vascular tissue that transports food from the leaves to other cells

germination

the early growth stage of the embryo when it becomes active and begins to grow roots and leaves

cotyledon

seed leaves used to store food

embryo

the part of a seed that is a zygote with the potential to become a new organism

tropism

the frowth response of a plant toward or away from a stimulus

pollination

transfer of pollen from the anther to the stigma of a plant

transpiration

the emission of water vapor from the leaves of plants

gymnosperm

a plant that produces seeds that are not enclosed by a protective covering

angiosperm

flowering plant; bears its seeds within a layer of tissue that protects the seed

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