circulation and respiration

What does having an open circulatory system mean?

Hemolymph is not completely enclosed in a system of tubes and vessels.

What are the purpose of sinuses?

Channel flow of hemolymph.

What is the purpose of diaphragms?

Propel hemolymph through undulations.

How many sinuses and diaphragms are there?

3 major sinuses separated by 2 diaphragma.

Where is the dorsal vessel?

Rests on the pericardial diaphragm.

What does the dorsal vessel consist of?

Aorta and heart.

Where is the head located and what is its purpose?

Located in the head, thorax, and anterior abdomen. Its a simple conduit for hemolymph.

Where is heart located and what is its purpose?

Its located in the abdomen and consist of segmentally arranged chambers that draw in hemolymph through valved ostia and pump it anteriorly.

What are the accessory pulsate organs and what is their functions?

They are contractile organs and they help to drive hemolymph in appropriate directions.

What is the missing term?

Accessory pulsating organs.

What is the missing term?

Dorsal membrane.

What is the missing term?

Dorsal aorta.

What is the missing term?

Perivisceral sinus.

What is the missing term?

Pericardial sinus.

What is the missing term?

Gut

What is the missing term?

Perineural sinus.