Animals lecture 2-8 Flashcards
What makes it an animal
Eukaryote, multicellular, heterotropic
an organism that cannot fix carbon and uses organic carbon for growth
Heterotrophic
Metazoa
Animalia
Complex unicellular, closest thing to animals
Choanophlagelates
Non-motile
Sessile
Lives on bottom
Benthic
Sponges are not a
Monophyletic group
Marine and freshwater, sessile and benthic, suspension feeders
Sponges
These distinctive cells line the interior body walls of sponges. These cells have a central flagellum that is surrounded by a collar of microvilli. It is their striking resemblance to the single-celled protists called choanoflagellates that make many scientists believe that choanoflagellates are the sister group to the animals. versatile cells. Their flagella beat to create the active pumping of water through the sponge, while the collars are the primary areas that nutrients are absorbed into the sponge.
Choanocytes
Tubular cells which make up the pores of a sponge known as ostia.
Porocytes
mobile cell (moving like an amoeba) in the body of invertebrates such as echinoderms, mollusks, tunicates or sponges. They move by pseudopodia.
Amoebocytes
a minute sharp-pointed object or structure that is typically present in large numbers, such as a fine particle of ice.
Spicules
Make the collagen related protein spongin which can be found in the mesophyl
Spongocytes
Spicules are calcium carbonate, less diversity
Calcarea
Spicules are made of silica; more diverse
Silicarea
Biochemicals that are not necessary for “normal” physiology or development
Secondary metabolites
a situation where to gain some advantage, you have to pay a price. Big brains in people are a good example. Our brains are certainly nice to have but they are costly in terms of the energy they use up, make childbirth difficult, and are easily damaged.
Trade off
Animals with true tissues
Eumetazoa
the outermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the epidermis and nerve tissue.
Ectoderm
the innermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the lining of the gut and associated structures.
Endoderm
In the water column, not on bottom or top
Pelagic
All marine, mostly pelagic, 8 combs of Cilia that propel the animal
Ctenophora
responsible for both the digestion of food and the transport of nutrients throughout the body. The cavity has only one opening to the environment. Food goes in and waste comes out that same opening, making it a two-way digestive tract.
Gastrovascular cavity
Most cnidarians, marine, polyp stage only , sessile and colonial, asexual or sexual
Anthozoa