Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Japanese Beetle http://www.youtube.com/watch?v=ih_98UtAJSQ&feature=youtu.be Fun Facts http://www.bukisa.com/articles/41743_amazing-facts-about-arthropods Aphids are born pregnant without the benefit of sex – they can give birth 10 days after being born themselves Bedbugs can survive a year without feeding (man – 40 days no food) Typical bed usually houses have over 6 million dust mites Ants don’t sleep Mosquitoes dislike citronella – irritates their feet (love bananas though). By the way, they prefer blondes. Favorite color is blue Bees 4 wings move 11,400 strokes/min; fly 15 miles / h Largest cockroach measures 9.68 cm (3.81 inches) Queen bee lays fertilized eggs – the first queen that emerges destroys the rest Black widow venom is more potent than that of a rattlesnake Phylum Arthropoda Arthropods Make up about 80% of the known animal species Insects are by far the most common species of arthropods Arthropod means joint footed Range from the deep sea to mountain peaks Bilateral symmetry Growth requires molting General Arthropod Characteristics: Arthropods have: 1. Exoskeleton: - Most prominent characteristic is their outside skeleton, or exoskeleton. - Exoskeleton provides support, protection and attachment site for muscles. Made of protein and chitin Chitin is a strong, flexible, polysaccharide - All arthropods molt, or shed their exoskeletons periodically. After it molts, it grows before the new skeleton hardens. Skin glands digest the inner part of the exoskeleton and other glands secrete the new one. 2. Segmented Bodies - Have segmented bodies that show various patterns of segment fusion ( tagmosis) to form integrated unit like the head, adbomen, ... 3. Jointed Appendages - Have joints between body sections (includes legs and antennae) - Have jointed appendages (a structure such as a leg that grows out from the main part of the body) Characteristics cont… Cephalization is more prominent than in annelids (brain and complex sense organs in the head region) Special organs sense touch, vibration, and chemicals. The eyes of many arthropods are particularly specialized. Open circulatory system. The dorsal heart pumps blood from the posterior end of the animal to the anterior end. - Blood moves through the hemoceol (major body cavity) Phylum Arthropoda – 2 Subphylum Subphylum Chelicerates Class Arachnida Spiders, scorpions, mites, ticks Subphylum Mandibulates: (4 major classes) Class Crustacea Class Chilopoda Centipedes Class Diplopoda Crayfish, Crab, Lobster Millipedes Class Insecta Insects Subphyla Chelicera Chelicera are pointed appendages (modest pinchers) used for feeding and manipulating food (in lieu of chewing mandibles) The body of chelicerates has two major parts: 1. The cephalothorax is a fused section composed of the head and any body segments that have legs attached. 2. The abdomen consists of posterior segments that contain most of the internal organs. Lack antennae Nearly all have 4 pairs legs Subphyla Mandibulata: Unlike chelicerates, mandibulates have mandibles, or jaws, for chewing food. All mandibulates have antennae – segmented sense organs on the head Three distinct body regions - head, thorax, abdomen They have three or more pairs of walking legs Subphyla Mandibulata: Class Crustacea Crustaceans typically have: - two pairs of antennae - two or three body sections Cephalothorax – head fused with the thorax - chewing mouthparts called mandibles. - 5 or more pairs of legs • Primarily aquatic, few terrestrial The Crustaceans: Crayfish dissection on Friday! What to look for: Male vs Female Assignment Complete coloring assignment Pre-Lab reading for Crayfish dissection