Let’s Look at Slides #2
*Make sure you read the previous post*
The second part, going to do 22, let’s begin.
|wm||Whole mount (entire specimen or organism)|
19. Dragonfly Wings (w.m.):
20. Earthworm (c.s.):
21. Feather (w.m.):
Wow, that is the smallest feather I ever saw.
22. Fern Porthallia (w.m.):
A prothallium or prothallus is usually the gametophyte stage in the life of a fern or other pteridophyte. Occasionally the term is also used to describe the young gametophyte of a liverwort or peat moss as well.
The prothallium develops from a germinating spore. It is a short-lived and inconspicuous heart-shaped structure typically 2–5 millimeters wide, with a number of rhizoids (root-like hairs) growing underneath, and the sex organs: archegonium (female) and antheridium (male). Appearance varies quite a lot between species. Some are green and conduct photosynthesis while others are colorless and nourish themselves underground as saprotrophs.
23. Fern Porthallia and Sporangia (w.m.):
A sporangium (pl., sporangia) is an enclosure in which spores are formed. It can be composed of a single cell or can be multicellular. All plants, fungi, and many other lineages form sporangia at some point in their life cycle. Sporangia can produce spores by mitosis, but in nearly all land plants and many fungi, sporangia are the site of meiosis and produce genetically distinct haploid spores.
24. Fern Leaf-Sorus (w.m.):
A sorus (pl. sori) is a cluster of sporangia (structures producing and containing spores) in ferns and fungi.
In fungi and lichens, the sorus is surrounded by an external layer. In some red algae, it may take the form of a depression into the thallus.
In ferns, these form a yellowish or brownish mass on the edge or underside of a fertile frond. In some species, they are protected during development by a scale or film of tissue called the indusium, which forms an umbrella-like cover.
Sori occur on the sporophyte generation, the sporangia within producing haploid meiospores. As the sporongia mature, the indusium shrivels so that spore release is unimpeded. The sporangia then burst and release the spores.
The shape, arrangement, and location of the sori are often valuable clues in the identification of fern taxa. Sori may be circular or linear. They may be arranged in rows, either parallel or oblique to the costa, or randomly. Their location may be marginal or set away from the margin on the frond lamina. The presence or absence of indusium is also used to identify fern taxa.
25. Fish Blood Smear:
The dots are called Red blood cells (RBCs), also called erythrocytes, are the most common type of blood cell and the vertebrate’s principal means of delivering oxygen (O2) to the body tissues—via blood flow through the circulatory system. RBCs take up oxygen in the lungs, or gills of fish, and release it into tissues while squeezing through the body’s capillaries.
Wow! you could really see the red blood cells!
26. Fish Blood Smear #2:
Uh… There’s 2 in my case/box
I tried to look for the differences, but I don’t see any.
27. Frog Epidermic Cell (sec.):
The epidermis is the outer of the two layers that make up the skin (or cutis; Greek δέρμα derma), the inner layer being the dermis. It provides a barrier to infection from environmental pathogensand regulates the amount of water released from the body into the atmosphere through transepidermal water loss (TEWL).The outermost part of the epidermis is composed of stratified layers of flattened cells, that overlies a basal layer (stratum basale) composed of columnar cells arranged perpendicularly.
28. Frog Liver (sec.):
29. Frog Lung (sec.):
30. Frog Showing Spermary (sec.):
A spermary is tThe male germ-gland or essential sexual organ, of whatever character; the sperm-gland, or spermatic organ, or seminal gonad, in which spermatozoa are generated, in its specialized condition in the higher animals known as the testis or testicle. The term is used in distinction from ovary, both spermaries and ovaries being gonads. Also spermarium. But still, I don’t what it is.
31. Honeybee mouth parts (w.m.):
32. Housefly Mouth parts (w.m.):
33. Human blood Smear:
Yay! the red blood cells!
34. Human Hair (w.m.):
35. Hydra (c.s.):
Hydra is a genus of small, fresh-water animals of the phylum Cnidaria and class Hydrozoa. They are native to the temperate and tropical regions. Biologists are especially interested in Hydra because of their regenerative ability and they appear not to age or die of old age.
36. Ipomoea Leaf (c.s.):
Ipomoea is the largest genus in the flowering plant family Convolvulaceae, with over 500 species. It is a large and diverse group with common names including morning glory, water convolvulus or kangkung, sweet potato, bindweed, moonflower, etc.
37. Ipomoea Root (sec.):
Did you learn anything? Tell me in the comment section.