►Coldblooded Land Vertebrates
• Apologia Biology Exp 13.2, Frog Dissection
• Write about a coldblooded land vertebrate.
• Apologia Biology Exp. 11.3, Earthworm Dissection
♦ Practice a bit of labeling a virtual earthworm. External and Internal.
♦ Earthworm and Frog Dissection directions at Home Science Tools.
Land Vertebrates - Coldblooded
(1) Frog Anatomy - Part 1 (external)
Please ignore the evolutionary references! Frogs weren't "modified" nor did they need to "adapt" to anything. God made them the way they are so the first frogs could live and have more frogs. =)
(2) Frog Anatomy - Part 2 (internal)
(3) Virtual Frog Dissection for those that don't do an actual dissection.
Scroll down and click View Demo. You will be instructed different buttons to click on. As you hover over the buttons, the name of that button appears at the bottom of the screen. Body parts will do the same thing, so you'll know if you are on the right part.
--About 8-10 minutes, depending on how long it takes to locate various body parts. Longer if you take notes and/or draw diagrams.
Some invertebrates are arthropods.
Arthropod means jointed leg or foot. Arthropods have an exoskeleton instead of having an inside skeleton. This means they are also invertebrates - they don't have a backbone.
►Earthworms are invertebrates but are clearly not arthropods, lol.
We already learned about arthropods when we studied the Aquatic and Avian chapters -- the flying insects in the Avian chapter, and the crustaceans (crabs, lobsters, shrimp, etc) from the Aquatic chapter.
But there are arthropods that don't fly and don't live in water. These are land invertebrates -- insects that crawl rather than fly, as well as spiders, ticks, mites, millipedes, and centipedes to name a few.
►Just to be clear, this section of the chapter is about invertebrates, not arthropods, although I do cover here what arthropods are.
(4) General Characteristics of Arthropods
(5) Insects & Arthropods
One of the characteristics of arachnids is that they have a cephalothorax instead of a separate head and thorax like insects. So spiders only have two body parts while insects have three. Insects and spiders both have an abdomen.
(6) Trapdoor Spider
(7) How do Trapdoor Spiders know when prey is near???
(8) Giant Centipede (has 1 set of legs on each body segment)
(9) Millipede (has 2 sets of legs on each body segment)
(10) Leafcutter Ants
(11) Dead Leaf Mantis
(12) Flower Mantis
(13) Javanese Leaf Insect
(14) Earthworm Anatomy