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To adjust body temperature insects or reptiles will move their body to a location that will ether warm or cool their body depending on their needs. Compare the differences between warmblooded and cold blooded organisms. Multicellular organisms maintain homeostasis differently. There are many more system accommodations that occur as you run or engage your body in different activities. Without your body systems working together your systems will fail and death would ensue.
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Your skin starts to sweat reducing the excess body heat created by the activity. Your body is trying to deliver oxygen and take away carbon dioxide (respiratory waste) form working muscles etc. Your heart starts beating faster and your breathing increases. Various systems will start to work overtime keeping your body alive. For example when you run your body is placed under sever stress. Multicellular organisms have “systems” that work together to maintain this stable environment. " Living things carry out different essential functions in order to accomplish this task. The term used to describe this is "homeostasis. Mites and ticks 3.All living things must maintain a relatively stable internal environment to survive. Carnivores that have pedipalps adapted for capturing and holding prey and chelicerae adapted for biting and sucking out their soft partsġ. Four pairs of walking legs on their cephalothorax 2. Lack sensory “feelers” (antennae) on the headġ5 II. Subphylum Chelicerata has 3 main characteristics 1. Butterfly LifeCycle Incomplete Metamorphosis is involves stages with a physical appearance that more closely resembles one another (usually: egg, nymph, adult). What is the difference between complete metamorphosis and incomplete metamorphosis?Ĭomplete Metamorphosis involves VERY different physical appearances at the different stages of growth (usually: egg, larva, pupa, adult). Wait for the new exoskeleton to harden during these few hours to a few days, the new shell is soft and the animal is quite vulnerable Giant Spider Crab Moltġ3 C. The animal then expands to its new, larger size, and the new exoskeleton stretches to cover it 5. Arthropod pulls completely out of its old exoskeleton (may eat what’s left – more recycling) 4. Secretes a new exoskeleton inside the old one 3. The epidermis digests the inner part of the exoskeleton, absorbing the chitin to recycle it 2. Describe the steps that occur during molting: 1. What is a problem with exoskeletons? They must be replaced with larger ones in order to allow the body inside to increase in size as it matures B. Males transfer sperm directly or drop a packet of sperm that is picked up by the female Cockroachesġ2 II. Drop a body part) d) Visual trickery (ex. Venomous stings and bites Attack with powerful claws, chemicals Create a diversion (ex. Have sense organs such as: a) Statocysts b) Chemical receptors c) Compound eyes d) Taste receptors e) Sensory hairs f) Ears Nervous system composed of: a) Brain (with 2 ganglia in the head) b) A pair of nerves that runs around the esophagus and connects the brain to a ventral nerve cordĩ 2. Metabolic waste eliminated by: a)Malphighian tubules - filter nitrogen based waste from blood b)Diffusion through the gills c) Green glands - filter blood at base of antennaeĨ H. Internal Transport Have a well-developed heart pumping blood through an open circulatory system Blood moves out of vessels through spaces called sinusesħ G. Herbivores – locusts Carnivores - spiders, centipedes Parasites - ticks, fleas, lice d) Filter feeders - marine arthropods (barnacles) e) Detritus feeders - crayfishīasic types of respiratory structures: a) Gills b) Book gills and book lungs c) Tracheal tubes F. Feeding List and give an example of each type of feeding method Exoskeleton: A system of external supporting structures that are made of carbohydrate chitin a) Function: i) Protection ii) Waterproof (prevents water loss) iii) Move efficiently b) Disadvantage: Skeleton cannot grow as the animal growsĥ D. Open circulatory system with a heartĤ Arthropod body plan 1. Segmented bodyģ Many arthropods have 3 additional features:ġ.
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Presentation on theme: "28-1 Introduction to Arthropods"- Presentation transcript:Ī.