Lab Quiz 1 Flashcards
(121 cards)
amphioxus (basal chordates): what is the rostrum?
anterior tip of animal
amphioxus (basal chordates): what is the function of the buccal cirri?
- to keep large particles from entering the pharynx
- contains taste discriminating elements
amphioxus (basal chordates): what is the function of the pharynx?
- ciliated lining of the pharyngeal bar traps food particles and moves them dorsally towards the intestine
- removes excess water out of the body through the pharyngeal slit
amphioxus (basal chordates): what is the nerve cord?
component of the nervous system
amphioxus (basal chordates): what is the function of the notochord?
makes the body more rigid
amphioxus (basal chordates): what is the eyespot?
frontal eye pigment that is a sensory organ for light intensity
amphioxus (basal chordates): what are the ocellus?
photoreceptors
amphioxus (basal chordates): what is the myomeres?
muscles for locomotion
amphioxus (basal chordates): what is the hepatic diverticulum and its function?
midgut cecum/diverticulum involved in the production of digestive enzymes
- homologous with liver or pancreas
amphioxus (basal chordates): what is the atrium?
body chamber that houses the organs
amphioxus (basal chordates): what is the function of the atriopore?
water expulsion
amphioxus (basal chordates): what is the function of the intestine/hindgut?
to digest food
amphioxus (basal chordates): what is the function of the anus?
waste expulsion
amphioxus (basal chordates): what is the function of a wheel organ?
creates the vortex of water current into pharynx
amphioxus (basal chordates): what is the function of the epibranchial groove?
pathway for food particles to be transported from pharynx to gut
amphioxus (basal chordates): what is the endostyle and its function?
produces mucus lining of the pharynx to trap particles and binds iodine and produces iodine compounds
- homologous with the endostyle in urochordates and thyroid gland in higher vertebrates
adult tunicate: what is a tunic?
outer wall of the body
adult tunicate: what is the function of an incurrent siphon?
take in water and food, which then travels to the pharynx
adult tunicate: what is the function of an excurrent siphon?
expels water, waste, and fertilised eggs
adult tunicate: what is the function of a pharynx with stigmata?
ciliated structures that creates water current and traps food particles
adult tunicate: what is the function of the endostyle?
produces mucus lining of the pharynx to trap particles and binds iodine and produces iodine compounds
- homologous with the endostyle in urochordates and thyroid gland in higher vertebrates
adult tunicate: what is the function of the intestine?
to digest food
adult tunicate: what is the function of the anus?
for waste expulsion
adult tunicate: what is the function of the atrium?
houses the organs