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23 Cards in this Set

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Symmetry
similarity of form or arrangement on either side of a dividing line or plane
Asymmetry and example of organism that is
Any line or plane through the center that does not result in equivalent parts
Some protists (I.E. Amoeba)
Radial Symmetry and example
Any cut passing through center results in two halves essentially identical.
Does not have radial symmetry as viewed from side
I.E. a pie, coin, petri dish

Starfish, sea anemone, sand dollar
Bilateral Symmetry
Most common symmetry in animal kingdom.
Only ONE cut can be made which will yield two essentially alike pieces
Median Plane and compatibility with which type of symmetry
Aka Midsagittal plane.
Vertical Longitudinal plane passing through the organism dividing it into essentially identical halves (right and left)
Bilateral symmetry only
Sagittal Plane and compatibility with which type of symmetry. Also another name for it
Any vertical longitudinal plane through organism, median or any plane parallel
Non median plane called parasagittal.

Bilateral symmetry only
Frontal Plane and compatibility with which type of symmetry. Also another name for it
Any longitudinal plane which occurs at right angles to the sagittal plane
Aka Coronal Plane

Bilateral symmetry only
Cross Plane and compatibility with which type of symmetry. Also another name for it
Any plane or section at right angles to both sagittal and frontal planes (in bilateral)
Aka Transverse Plane
Both.
Radial Plane and compatibility with which type of symmetry.
Any plane passing through the center and along the central axis.
Infinite number of cuts can be made, all resulting in two identical portions.
Radial symmetry only
Tangential Plane and compatibility with which type of symmetry.
Any plane or section parallel to central axis and not passing through the center
Radial symmetry only
Transverse Plane and compatibility with which type of symmetry. Also another name for it
A plane or section at right angles to the radial (and tangential)
(in Radial)
Aka cross plane
Both
What are the 3 pairs of terms referring to Head and Rear end.
Superior and Inferior
Cranial and Caudal
Anterior and Posterior
What is Superior & Inferior?
Applies to what organisms?
Superior - the head, upper end

Inferior - the rear, lower end
Used for humans only
What is Cranial & Caudal?
Applies to what organisms?
Cranial- the head end
Caudal- the rear end
Cranial used in animals with brain case
Caudal for animals with tail only
What is Anterior & Posterior?
Applies to what organisms?
Anterior- the part of the body that goes forward in locomotion (the front)

Posterior- the part of the body that is not forward in locomotion (the rear)
Anterior- the head end in 4 legged animals.
The front or belly side of humans.

Posterior- The rear end of 4 legged animals.
The backside of humans
What are the 2 pairs of terms referring to the back side and belly side?
Dorsal and Ventral
Anterior and Posterior
What is Dorsal & Ventral?
Applies to what organisms?
Dorsal- the backside of 4 legged animals.

Ventral- belly side or underside of 4 legged animals
Both
What is Anterior & Posterior?
Applies to what organisms?
Anterior- the front surface of a human

Posterior- the back surface of human
human only
What are the 3 pairs of terms referring to points on midline or center?
Medial and Lateral
Central and Peripheral
Superficial and Deep
What is Medial & Lateral?
Applies to what organisms?
Medial- toward or on the midline of the body or organ

Lateral- either away from or to the side of the midline of body or organ
What is Central & Peripheral?
Applies to what organisms?
Central- the center of a spheroidal part or organ

Peripheral- along the outside of a spheroidal part or organ
???
What is Superficial & Deep?
Applies to what organisms?
Superficial (external)- on the outside

Deep (internal)- on the inside
???
What is Proximal & Distal?
Applies to what organisms?
Proximal- nearer to the point of attachment to the body axis or trunk in case of extremities; nearer to point of reference on internal organ

Distal- farther from the point of attachment to the body axis or trunk in case of extremities; farther from point of reference (internal organ)