Home › NEET UG › Biology › Structural Organisation in Animals › In cockroaches, the circulatory system is best d…
In cockroaches, the circulatory system is best described as:
AClosed (blood flows only in vessels everywhere)
BOpen (haemolymph fills the body cavity haemocoel)
CDouble circulation (pulmonary + systemic)
DSingle circulation (heart → gills → body once)
Answer & Solution
Correct answer: B. Open (haemolymph fills the body cavity haemocoel)
Cockroaches (and most arthropods) have OPEN circulation: heart pumps haemolymph into the BODY CAVITY (haemocoel), where it bathes organs directly, then returns to heart. Closed circulation is in earthworm, vertebrates.
Related questions
The communication junctions of cardiac muscle are called:Which muscle fibres taper at both ends and show no striations?Muscle fibres are composed of numerous fine fibrils called:Blood is a connective tissue that is:Blood cells are produced in the:The bone matrix is rich in collagen fibres and:Bone cells are present in spaces called:Bone cells are called: