dogfish shark everything Flashcards
(29 cards)
What is a spiracle?
Water passageway for respiration.
What are gill slits?
Individual openings to gills leading to the pharynx.
What do gill filaments do?
Absorb oxygen and remove CO2.
What are gill arches?
Support for the gills.
What are gill rakers?
Filters for the gills, prevent large particles from getting in and trapping food.
How many chambers does the heart have?
2 chambered heart.
What is the sinus venosus?
Opaque bag posterior to atrium.
What is the conus arteriosus?
Between ventricle and ventral aorta.
What is a clasper?
Delivers sperm inside a female.
What is a cloaca?
Allows elimination of excretory and digestive waste, location of copulation and birth.
What does the leydig’s gland do?
Secretes fluid into efferent ducts to protect sperm.
What does the rectal gland secrete?
Secretes salt solution that maintains salt balance.
What is the function of the testis?
Creates sperm.
What does the vas deferens do?
Transports sperm to cloaca.
What is the kidney’s role?
Flattened and dark in color, responsible for removing waste, anterior portion reproductively functional in males.
What is the function of the ovary?
Produces eggs, ball-like structure.
What does the oviduct do?
Transports egg to uterus.
What is the uterus?
Place where fertilized eggs develop into embryos.
What is the shell gland?
Anterior end of oviduct, site of fertilization.
What is the anterior region of the brain called?
Telencephalon.
What does the telencephalon divide into?
Divides into olfactory lobes and cerebral hemispheres, main structures in more anterior regions are olfactory bulbs.
What is posterior to the telencephalon?
Mesencephalon.
What is the main posterior region of the brain?
Myencephalon.
What is the olfactory nerve?
Sensory nerve that conveys sense of smell.
