Shark anatomy Flashcards

1
Q

External nares (nostrils)

A

smell and helps detect chemicals

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2
Q

Spiracles

A

allows water to pass through gills

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3
Q

Mouth

A

water intake through gills & eating

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4
Q

Gill Slits

A

allows water to exit

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5
Q

Lateral Line

A

detects vibrations in water

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6
Q

Cloaca

A

releases waste and sperm, also opening for sex organs

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7
Q

Claspers

A

aid in sperm transfer during mating

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8
Q

Fins

A

Caudal Fin = propulsion
Dorsal Fin = stability
Pectoral Fin = steering
Pelvic Fin = stabilize and allow up & down movements

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9
Q

Dorsal Spines

A

has poison gland for defense

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10
Q

Ampullae of Lorenzini

A

(electroreceptor) detects electronic field changes

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11
Q

Scales

A

Denticles (made up of placoid scales) for protection & reduce turbulence so sharks swim quicker

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12
Q

Myomeres

A

muscles that allow lateral movements

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13
Q

Myosepta

A

connective tissues that connects myomeres together

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14
Q

Esophagus

A

connects pharynx to stomach

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15
Q

Stomach

A

aids in digestion

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16
Q

Duodenum

A

(1st part of intestine) receives bile from bile duct, mixing bowl of digestive juices)

17
Q

Gall Bladder

A

stores bile secreted by the liver

18
Q

Bile Duct

A

carries bile to the duodenum

19
Q

Liver

A

produces squalene (increase buoyancy) & bile (breaks down fat)

20
Q

Pancreas

A

secretes digestive enzymes into the stomach

21
Q

Spiral Valve (intestine)

A

(2nd part of intestine) has spiral valve; increases surface area which makes the intestine more efficient in food absorption

22
Q

Rectum

A

(2nd part of intestine) stores solid wastes

23
Q

Rectal Glands

A

regulate salt concentration

24
Q

Heart

A

ventral heart, has atrium and ventricle

25
Q

Atrium

A

receives blood

26
Q

Ventricle

A

pumps blood

27
Q

Conus Arteriosus

A

gives blood flow an added boost

28
Q

Spleen

A

stores & repairs red blood cells

29
Q

Gills

A

allows fish to take in oxygen from water & get rid of carbon dioxide

30
Q

Kidneys

A

extracts urea from urine & returns the urea to the blood

31
Q

Testis

A

produce sperm

32
Q

Ovaries

A

generate germ cells, secrete hormones, collect accumulate yolks/eggs

33
Q

Uterus

A

where eggs develop into embryos

34
Q

Yolk sac

A

provides embryo with nourishment

35
Q

Embryo

A

unborn shark egg that will develop into a shark

36
Q

3 parts of intestine

A

Duodenum, Spiral Valve, Rectum