Although the majority of sponges live in marine habitats, one family, the Spongillidae, is found in fresh water. Pituitary, pineal, thyroid, parathyroids, endocrine pancreas, adrenals, testes, and ovaries. Learning Objectives Explain the position of the phylum Porifera in the phylogenetic tree of invertebrates Key Points As larvae, sponges are able to swim, but as adults, they are sessile, spending their life attached to a substrate. Provides communication within the body via hormones and directs long-term change in other organ systems to maintain homeostasis Mouth, salivary glands, esophagus, stomach, liver, gallbladder, exocrine pancreas, small intestine, and large intestine in all parts of the body, such as, the squeezing of water channels. Processes foods and absorbs nutrients, minerals, vitamins, and water Keywords Sponges, respiration, oxygen consumption, spicules, ultravioletB radiation. Transports oxygen, nutrients, and other substances to the cells and transports wastes, carbon dioxide, and other substances away from the cells it can also help stabilize body temperature and pHÄefends against infection and disease and transfers lymph between tissues and the blood stream
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