Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/42

Click to flip

42 Cards in this Set

  • Front
  • Back
Dorsal
describing the back portion of structure
Ventral
describing the lower surface of a structure
Medial
describing the mid region of an organism
Lateral
the sides, right and left
Anterior
the head end, or the part, which moves forward
Posterior
the tail end of the animal
Distal
away from the main mass of the body
Example of Distal
fingers
Proximal
near the main mass of the body
Example of proximal
shoulder
thigh
Peripheral
on or near the surface?
Superifical
on or near the surface
Central
toward the middle fo the body
Oral
the surface on n which the mouth is located
Aboral
the surface opposite from that containing the mouth
Cranial
towards the head
Caudal
towards the tail
Anteroposterior/longitudinal axis
a line extending from the head to the tail (not necessarily dividing the body in half)
Dorsivental axis
a line running across the body from teh dorsal to the ventral side
Transverse axis
a line running across the body from side to side
Sagittal/median plane
the plane is vertical and passes through the exact mid-line of the body (it includes both anteroposterior and dorisiverntral axes)
Transverse plane
any cross section throught the body (includes transverse and dosiventral axes)
Frontal plane
any plane (includes trasverse and anteroposterior axes)
Name 4 characteristics of Cnidaria
1) Multiceullar
2) Radially symmetric
3) Lack organs
4) Prossess true tissue
What is the 2 body plans of Cnidarians
1) polyp
2) medusa
Name 2 functions of tentacles
1) Capture food
2) Protect the organism suurounds the mouth
Name 2 functions of gastrovascular cavity
-Preliminary phases of digestion
-food distribution
Gastrodermis
Epithelial tissue that lines the gastrovascular cavity
Hwo many cellular layers do cnidarians have?
1) an outer epidermis
2) An inner gastrodermis
What is the outer epidermis derived from?
Ectoderm
What is the innner gastrodermis derived from?
Endoderm
What is the name of the space between epidermis and gastrodermis?
Mesoglea
True/False: The mesoglea is a true cellular layer
False
Function of cnidocyte
Produce specialized stining organelles: nematocytes
2 Functions of nematocystes.
1) Eject small harpoon-like projections (usually is poison)
2) Attach to substratum to aid in locomotion
Name the digestion system in cnidocytes
Gastrovascular cavity
Name the central nervous system in cnidocytes
None
True/False: Testis and ovary in Cnidocytes do not consider as organ
True
How is hydra different from most cnidarians?
It doesn't have a medusa stage
Why is there bud on the hydra?
It is a form of asexual reproduction
Dioecious
Male and female reproductive parts are found in separate individuals
Hermaphroditic
Both male and female parts are found the same individual