arthropods 2
Terms
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- Artrhopod bodies are...
- encased in a rigid tegument consisting of hard plated connected by a flexible, chitinized membrane
- Arthropods have chitinized exoskeletons
- that are divisible into a head, thorax, and abdomen or have a fused head and thorax (cephalothorax)
- Arthropods Cephalic appendages that are
- converted into multi-jointed antennae, compound or simple eyes and chewing or biting mouth parts
- Arthropods Legs
- 3(insects) 4 (arachnids) pairs of legs and wings are either absent of occur as one or two pairs
- Arthropods Develop by molting in 3 diff. ways:
-
1. directly (all stages look like mini mi)
2. incomplete metamorphosis
(egg, nymph, adult)
3. complete metamorphosis (egg, larvae, pupae, adult) - Arthropods Digestive system that consists of a
- foregut composed of a pharynx, esophagus, and proventriculus, a stomach, or midgut and a hindgut, intestine, rectum and anus
- Arthropods Nervous system consists of an
- anterior brain or chain of ventral ganglia from which nerves pass to the tissues and sensory organs
- Arthropods respiratory system is comprised
- of branching tracheal tubes communicating with the exterior by spiracles
- Arthropods Circulatory system
- consists of a dorsal pulsating organ and an aorta that circulates hemolymph throughout the body cavity, the hemocoel
- Arthropods excretory system is composed of
- malpighian tubules that empty into the intestinal canal
- Arthropds are dioceious. and are either___,___,___.
- oviparous, viviparous, or ovoviviparous.
- Arthropods Male reproductive organs consist of
- testes, seminal vesicle and accessory glands
- Arthropods Female reproductive organs include
- ovaries, oviducts, a seminal receptacle, cement glands, and an oviposter
- Arthropods live for
- short periods of time (seasonal) or can live for several years