Question: The body wall of a nematode is constituted of:
Options:
Cuticle
Hypodermis
Muscle layer
All of these
• The body wall of a nematode is a complex multi-layered structure essential for protection, support, movement, and sensory perception. While the hypodermis is a crucial component, it's not the sole constituent of the body wall. The body wall is composed of the following layers:
Cuticle: This is the outermost, non-cellular layer. It's tough and flexible, providing protection and structural support while allowing for movement.
Hypodermis: This is a cellular layer beneath the cuticle. It secretes the cuticle and plays roles in nutrient absorption and sensory perception. In some nematodes, it's syncytial (a single cell with multiple nuclei).
Muscle Layer: This is the innermost layer, comprised of longitudinal muscles. These muscles enable the nematode's characteristic whip-like movement. In this image, you can see the three distinct layers of the body wall.