WebThe injectable pain-killing drug called ziconotide is an improvement over morphine-type drugs because: A. It can easily be extracted from cone snails. B. It is less expensive to produce than morphine. C. It also removes the memory of pain from the affected person D. It is not addictive. E. none of these answers D. It is not addictive. WebSponges are similar to other animals in that they are multicellular, heterotrophic, lack cell walls and produce sperm cells. Unlike other animals, they lack true tissues [9] and organs. [10] Some of them are radially symmetrical, but most are asymmetrical. The shapes of their bodies are adapted for maximal efficiency of water flow through the ...

Sponges Flashcards Quizlet

WebThe morphology and physiology of sponges were first adequately understood by who created in 1836 the name Porifera for the group by which it is now generally known, iuxle … WebChoanocytes (collar cells) form lining of spongocoel in poriferans (sponges). Flagella in collar cells provide circulation to water in water canal system. kewtopia ハンデコルテ

12.2: Internal Leaf Structure - Biology LibreTexts

WebSycons are typically small, they range from 2.5cm to 7.5cm in height. These tube-shaped structures resemble water vessels. In some instances, they are also referred to as crown sponges because of the spicules they possess, arranged in the form of a crown while in some other instances, they are referred to as Q-tip or “Pineapple” sponges based on … WebBetween the outer layer and the feeding chambers of the sponge is a jelly-like substance called the mesohyl, which contains collagenous fibers. Various cell types reside within … The mesohyl, formerly known as mesenchyme or as mesoglea, is the gelatinous matrix within a sponge. It fills the space between the external pinacoderm and the internal choanoderm. The mesohyl resembles a type of connective tissue and contains several amoeboid cells such as amebocytes, as well as fibrils and skeletal elements. For a long time, it has been largely accepted that sponges lack true tissue, but it is currently debated as to whether mesohyl and pinacoderm l… kex1150 エプロン