During Gastrulation in Sea Urchins,which Forms First,the Mouth or the Anus

question 26

Short Answer

During gastrulation in sea urchins,which forms first,the mouth or the anus?

---

Definitions:

Mylohyoid

A muscle beneath the chin that plays a role in elevating the floor of the mouth during swallowing.

Adduct

To draw a limb or part of the body toward the median axis.

Gluteus Medius

A muscle located on the outer surface of the pelvis, crucial for hip stabilization and movement.

Pectineus

A muscle in the thigh involved in the movement of the hip and thigh, such as adduction and flexion of the thigh.