Presentation on theme: "Chapter 14 The Arthropods: Blueprint for Success."— Presentation transcript:
Chapter 14 The Arthropods: Blueprint for Success
The Exoskeleton An external, jointed skeleton, called and exoskeleton or curicle, enclose arthropods,
Classification of the Phylum Arthropoda Phylum Arthropoda Subphylum trilobitomorpha Subphylum Chelicerta Class Merostomata Class Arachnida Subphylum Myriapoda Subphylum Crustacea Class Remipedia Class Cephaocardia Class Branchiopoda Class malacostraca Class maxillopoda Subphylum hexapoda
The Hemocoel A third characteric is the presence of a hemocoel.
Subphlum Trilobitomorpha The prosoma or cephalothoraxes is a sensory, feeding, and locomotors tagma. The first paired, called chelicerae, are often pincerlike or chelate, and are most often feeding. Posterior to the prosoma is the opisthosoma.
Sunphylum Chelicerata Trilobite appendages consisted of two lobes or rami, and are called biramous appendages.
Form and Function Coxal glands are paired, thin walled sperical sacs bathed in the blood of body sinuses. Malpighian tubles, absorb waste material from the blood and empty into the gut tract. Some arachnids posses are called book lungs.
Order Scorpionida Most arthropods are oviparous; female lay eggs that develop outside the body. Ovoviviparous; development is internal, although large yolky eggs provide all the nourishment for development.