Term
Identify the following numbered structures (note: 8 and 9 are the same).
[image] |
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Definition
4: Lateral Line
6: Anterior Dorsal Fin
7: Posterior Dorsal Fin
8/9: Caudal Fin
11: Pelvic Fin
12: Pectoral Fin |
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Term
| What's the function of the pelvic fins? |
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Definition
| They are stabilizers preventing roll and pitch. |
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Term
| What are the functions of the pectoral fins? |
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Definition
| They provide lift to keep the shark from sinking and act as stabilizers. |
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Term
| What are the functions of the lateral line? |
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Definition
| It detects vibrations and changes in water pressure. |
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Term
| What's the function of the caudal fins? |
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Definition
| They provide thrust when swimming. |
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Term
| What are the functions of the dorsal fins? |
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Definition
| They help with steering and direction while swimming and are used for defense. |
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Term
Identify the following external feature (*hint* male): #10.
[image] |
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Definition
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Term
| What are the functions of the claspers? |
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Definition
| They hold the male to the female during mating and provide a path for sperm to travel through. |
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Term
Identify the following external features (1,2,3,13,14):
[image] |
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Definition
1: Rostrum
2: Temporal Canthus
3: Spiracle
13: Gill Slits
14: Mouth |
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Term
| What's the function of the rostrum? |
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Definition
| It overcomes water resistence when swimming. |
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Term
| What's the function of the spiracle? |
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Definition
| It is a passageway for water to enter the gills for respiration when the mouth is closed. |
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Term
| What are the two layers of skin and their respective functions? |
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Definition
1: Epidermis-outermost layer, it is waterproof and prevents bacteria from entering the body
2: Dermis-innermost layer, it provides skin with elasticity |
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Term
Identify the following features (2,16):
[image] |
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Definition
2: Nasal Canthus
16: Ampullae of Lorenzini |
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Term
| What are the functions of the ampullae of lorenzini? |
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Definition
| They are sense organs that detect changes in temperature, salinity, and electrical fields. |
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Term
| What are the functions of the conjunctiva? |
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Definition
| It connects the lid to the eye and protects the eye's surface. |
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Term
| What is the function of the iris? |
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Definition
| It controls the amount of light entering the eye. |
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Term
| What's the function of the pupil? |
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Definition
| It is the opening where light enters the eye. |
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Term
| What's the function of the cornea? |
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Definition
| It's the clear covering oer the iris for protection. |
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Term
| What's the function of the cloacal aperature? |
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Definition
| It receives the waste products of the digestive, urinary, and reproduction systems. |
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Term
| What are the functions of the incurrent and excurrent nasal aperatures, respectively, and how do they differ? |
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Definition
| The incurrent allows water into the olfactory sacs, and the excurrent releases the water after the scent is detected. The excurrent is located above the larger incurrent. |
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