Cockroach Circulatory System Concepts

The video explains the open circulatory system of cockroaches, highlighting the role of hemolymph, a colorless fluid that fills the body cavity. The body cavity is divided into three sinuses: pericardial, perivisceral, and perineural. The heart, an elongated tubular structure with 13 chambers, facilitates hemolymph flow. Allery muscles aid in the circulation process by contracting and relaxing, allowing hemolymph to move through the heart and sinuses.

What type of circulatory system does a cockroach have?

• Closed circulatory system

• Single circulatory system

• Double circulatory system

• Open circulatory system

What is the function of the hemolymph in a cockroach?

• Transport oxygen

• Fill the body cavity

• Digest food

• Protect against predators

Which sinus contains the heart in a cockroach?

• Perivisceral sinus

• Perineural sinus

• Dorsal sinus

• Pericardial sinus

How many chambers does the cockroach heart have?

• 10

• 12

• 15

• 13

Where does the first chamber of the cockroach heart open into?

• Thoracic sinus

• Perineural sinus

• Perivisceral sinus

• Head sinus

What happens when the alary muscles contract?

• The heart stops beating

• The hemolymph exits the body

• The pericardial diaphragm stretches

• The pericardial diaphragm contracts

Through what do hemolymph enter the heart from the pericardial sinus?

• Valves

• Aorta

• Osta

• Sinuses

What is the role of the valves in the cockroach heart?

• Allow flow from the heart to the pericardial sinus

• Prevent flow from the pericardial sinus to the heart

• Allow flow from the pericardial sinus to the heart

• Prevent flow from the heart to the head sinus

What direction does the peristaltic movement of the heart chambers carry the hemolymph?

• From anterior to posterior

• From posterior to anterior

• From left to right

• From right to left

Where does the hemolymph return after reaching the head sinus?

• Pericardial sinus

• Perivisceral and perineural sinuses

• Thoracic sinus

• Abdominal sinus