Gill Anatomy and Function Assessment

The video explores the anatomy and function of shark gills, detailing their structure from macroscopic to cellular levels. It explains how gills facilitate gas exchange and perform roles similar to kidneys. The video also compares gill structures in sharks and bony fish, highlighting differences in anatomy and physiology. It concludes with resources for further learning.

What is one of the additional roles of shark gills besides gas exchange?

• Digestion of food

• Excretion of nitrogen compounds

• Photosynthesis

• Production of sound

How many gill arches do dogfish have on each side?

• Three

• Five

• Nine

• Seven

What is the function of the interbranchial septum in shark gills?

• To filter food particles

• To support the gill arches

• To divide the anterior and posterior hemi branch

• To produce mucus

What are the finger-like extensions on gill filaments called?

• Lamellae

• Pillar cells

• Pavement cells

• Chloride cells

What is the primary function of pillar cells in the gills?

• To produce mucus

• To separate blood channels

• To excrete waste

• To sense oxygen levels

Which cells in the gills are responsible for regulating salt content?

• Pavement cells

• Goblet cells

• Mitochondria-rich cells

• Neuroepithelial cells

What is the role of goblet cells in the gills?

• To produce mucin

• To separate blood channels

• To support gill arches

• To regulate blood flow

How does the counter-current exchange system benefit gas exchange in gills?

• It prevents water loss

• It maintains a concentration gradient

• It reduces blood flow

• It increases water resistance

What is a key difference between shark and bony fish gills?

• Bony fish have more robust gills

• Sharks have larger interlamellar spaces

• Bony fish have a complete interbranchial septum

• Sharks have more gill arches

What is the function of the efferent branchial artery in the gills?

• To support the gill structure

• To produce mucus

• To bring deoxygenated blood to the gills

• To carry oxygenated blood away from the gills