Animals. General Characteristics of Animals. Chapters 29 to 34 Here is how you will set up your foldable. Invertebrates Vertebrates. Early Humans Fishes Amphibians Reptiles Birds. Sponges Mollusks Annelids Arthropods Echinoderms. General Characteristics of Animals.
General Characteristics of Animals
-heterotrophs – get food from somewhere else
-mobility – can move
-multicellular – made of more than one cell
-diploid (one gene from mom and one from dad)
-cell organization into tissue
-no cell wall on their cells
Body Plan– describes the animal’s shape, symmetry and internal organization.
The organism can be divided equally around a central point.
The organism can be divided equally in half. The right and the left sides are exact the same. HUMANS
-ostia – tiny opening or pores where water enters.
-oscula – where water exits.
-sessile – where the sponge attaches to the bottom of the water.
Let’s see a sponge feeding!
There are two shapes that cnidarians come in:
medusa and polyp – radial symmetry
Attached to rocks or other objects
Coral and sea anemone
-mostly found as a parasite in dogs (canines)
-They have long, cylinder-like bodies with a one way digestive system.
-There are 50 species of roundworms that can do damage to animals, people or plants.
-excretory system (poop)
-locomotion – move with parapodia (bristle like structures)
THEY ALL HAVE:
The mollusks without shells via water jet propulsion - SQUID.
The mollusks with shells:
A. Have three body parts (especially the ones with shells):
-mass – central section that contains organs.
-mantle – heavy fold of tissue that makes up the outer
-foot – muscular region that is used for locomotion.
B. Many have shells that serve as PROTECTION and a place for MUSCLES TO ATTACH.
that extend from the body and have joints.
In a chrysalis
-endoskeleton - skeleton made of calcium inside the body.
-5 part radial symmetry.
-Water vascular system – filter water for food and oxygen.
-Coelomic and respiration – to get rid of waste and breath through gills.
Lancelet – resembles a fish. Cannot be found in shallow ocean water. Filters protists from the water.
Tunicates – Filter feeding marine animals
Chordates with a backbone that provides support, protects the dorsal chord and provides a place for muscle attachment .
Metabolism too slow to maintain body heat so the organism has to absorb heat from the environment.
Can maintain constant temperature by producing it internally.
Not all fish look “fishy”. There are three groups
MAJOR CHARACTERISTICS IN COMMON.
-Gills – they obtain oxygen (gas dissolved in the water) from the water.
-Swim Bladder – allows fish to go up and down in the water (bouyant)
-Single-loop blood circulation– blood pumps from the heart, to the gills, gills to the rest of the body and back to the heart.
-Vertebral column– have an internal skeleton made of cartilage or bone.
Complex Heart Structure
Many people tend to be afraid of these organisms.
Crocodiles, alligators, lizards, turtles and snakes
SNAKES - different features; flexible body, swallow prey whole, lack moveable eyelids and external ears).