21. A : The contractile vacuole is full of water. 22. Ejectosomes apparently exert a contractile force, forming a tight septum around the bacteria. 23. In addition to sensory cells differentiated during development, adult Porifera display contractile activity. 24. Also their contractile capacity may help pull tissue together in the wound healing mechanism. 25. This leads to an accumulation of non-contractile material in the skeletal muscle. 26. All are elongated, flexible and highly contractile . 27. Immediately after the contractile vacuole ( CV ) expels water, its membrane crumples. 28. Other tests showed an improvement in cardiac cell contractile function by inhibiting G ??. 29. The two short and rather thick tentacles are contractile and concealed under the shield. 30. D : Contractile Vacuole gains water from cytoplasm.
