Let’s Look at Slides #1

Let’s Look at Slides #1

Well, after that post I had an idea. The idea was: Let’s look at microscope slide specimens. On that post, some of the specimens in slides look interesting. So why don’t I look at every single one in that case…, box, or whatever you want to call it.

*Make sure to look at the previous post to understand whats going on*😃

Ok then, I have exactly 100 slides (this would take a long time to look at each one)

What I’m going to show you is slides, and there would be a lot of body parts and organs, and I’m going to tell you what each slide is. And also, this post took me 2 hours to do, so drop a like to show me that that 2 hours is valuable. 


I am going to do 25 of them. But I’m only going to do 18 because some of them are boring and we did some on the previous post.

Let’s begin!

1. Bacillus Smear:

Bacillus is a genus of gram-positive, rod-shaped bacteria and a member of the phylum Firmicutes. The first one we started is bacteria, and it’s a smear.

Bacillus subtilis Gram.jpg









I tried to look for the rods but unfortunately, my microscope is not strong enough, the purple dots in the picture could be the rods, or there are no rods.

2. Bee Wing (w.m.):

You know what a bee is and how the wings look like. But do you see the w.m.? It’s the abbreviation of Whole Mount. Which means entire specimen or organism.

Before we move on, look at this chart:

wm Whole mount (entire specimen or organism)
st Stained
ls Longitudinal section
cs Cross-section
sec Section
sm Smear
sq Squashed preparation

These are the abbreviations for the specimens in the microscope slides. You’ll see these as we go on. Let’s continue.20170720_150718





Look at the hairs on the wing. Looks pretty.


3. Cerebrum mammal (sec.):

The cerebellum (Latin for “little brain”) is a major feature of the hindbrain of all vertebrates. Although usually smaller than the cerebrum, in some animals such as the mormyrid fishes it may be as large as or even larger. In humans, the cerebellum plays an important role in motor control. You should know what that is.20170720_151222



4. Coprinus Mushroom set (cs.):

Coprinus is a small genus of mushroom-forming fungi consisting of Coprinus comatus (the shaggy mane) and several of its close relatives. Until 2001, Coprinus was a large genus consisting of all agaric species in which the lamellae autodigested to release their spores. (The black ink-like liquid this would create gave these species their common name “inky cap”.).20170720_151522



5. Cucurbita Stem (l.s.):

Cucurbita (Latin for gourd) is a genus of herbaceous vines in the gourd family, Cucurbitaceae, also known as cucurbits, native to the Andes and Mesoamerica. Five species are grown worldwide for their edible fruit, variously known as squash, pumpkin, or gourd depending on species, variety, and local parlance, and for their seeds.




6. Daphnia a.k.a Water Flea (w.m.):

I realized that the label was wrong. Anyway, Daphnia, a genus of small planktonic crustaceans, are 0.2–5 millimetres (0.01–0.20 in) in length. Daphnia are members of the order Cladocera, and are one of the several small aquatic crustaceans commonly called water fleas because their saltatory swimming style resembles the movements of fleas. Daphnia lives in various aquatic environments ranging from acidic swamps to freshwater lakes, ponds, streams, and rivers. To learn more about Daphnia, go to: https://en.wikipedia.org/wiki/Daphnia






7. Dog Duodenum (c.s.):

The duodenum is the first section of the small intestine in most higher vertebrates, including mammals, reptiles, and birds. In fish, the divisions of the small intestine are not as clear, and the terms anterior intestine or proximal intestine may be used instead of duodenum. In mammals, the duodenum may be the principal site for iron absorption.

20170720_153307 - Copy

20170720_153354 - Copy

8. Dog Esophagus (c.s.):

The esophagus (American English) or oesophagus (British English), commonly known as the food pipe or gullet, is an organ in vertebrates through which food passes, aided by peristaltic contractions, from the pharynx to the stomach. The esophagus is a fibromuscular tube, about 25 centimetres long in adults, which travels behind the trachea and heart, passes through the diaphragm and empties into the uppermost region of the stomach. During swallowing, the epiglottis tilts backwards to prevent food from going down the larynx and lungs.

20170720_153448 - Copy


9. Dog Jejunum (c.s.):

The jejunum is the second part of the small intestine in humans and most higher vertebrates, including mammals, reptiles, and birds.


20170720_153634 - Copy



10. Dog Pancrease (sec.):

The pancreas is a glandularorgan in the digestive system and endocrine system of vertebrates. In humans, it is located in the abdominal cavity behind the stomach. It is an endocrine gland producing several important hormones, including insulinglucagonsomatostatin, and pancreatic polypeptide which circulate in the blood. The pancreas is also a digestive organ, secreting pancreatic juice containing digestive enzymes that assist digestion and absorption of nutrients in the small intestine. These enzymes help to further break down the carbohydrates, proteins, and lipids in the chyme. The pancreas is also known as a mixed gland.20170720_153658 - Copy




11. Dog Rectum (c.s.):

The rectum is the final straight portion of the large intestine in humans and some other mammals, and the gut in others. The human rectum is about 12 centimetres (4.7 in) long, and begins at the rectosigmoid junction (the end of the sigmoid colon), at the level of the third sacral vertebra or the sacral promontory depending upon what definition is used.

20170720_153757 - Copy

20170720_153812 - Copy



12. Dog Skeletal Muscle (c.s.):

Skeletal muscle is one of three major muscle types, the others being cardiac muscle and smooth muscle. It is a form of striated muscle tissue which is under the ‘voluntary’ control of the somatic nervous system. Most skeletal muscles are attached to bones by bundles of collagen fibers known as tendons.




13. Dog Small Intestine (sec.):




14. Dog Spleen (sec.):

The spleen is an organ found in virtually all vertebrates. Similar in structure to a large lymph node, it acts primarily as a blood filter.

The spleen plays important roles in regard to red blood cells (also referred to as erythrocytes) and the immune system. It removes old red blood cells and holds a reserve of blood, which can be valuable in case of hemorrhagic shock, and also recycles iron. As a part of the mononuclear phagocyte system, it metabolizes hemoglobin removed from senescent red blood cells (erythrocytes). The globin portion of hemoglobin is degraded to its constitutive amino acids, and the heme portion is metabolized to bilirubin, which is removed in the liver.




15. Dog squamous Epithelium (w.m.):

Epithelium (epi- + thele + -ium) is one of the four basic types of animal tissue, along with connective tissue, muscle tissue, and nervous tissue. Epithelial tissues line the cavities and surfaces of blood vessels and organs throughout the body.

There are three principal shapes of epithelial cell: squamous, columnar, and cuboidal. These can be arranged in a single layer of cells as simple epithelium, either squamous, columnar, cuboidal, pseudo-stratified columnar or in layers of two or more cells deep as stratified (layered), either squamous, columnar or cuboidal. All glands are made up of epithelial cells. Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing.

Epithelial layers contain no blood vessels, so they must receive nourishment via diffusion of substances from the underlying connective tissue, through the basement membrane. Cell junctions are well-employed in epithelial tissues.





It looks beautiful!



16. Dog Stomach (sec.):






17. Dog Trachea (c.s.):

The trachea, colloquially called the windpipe, is a cartilaginous tube that connects the pharynx and larynx to the lungs, allowing the passage of air, and so is present in almost all air-breathing animals with lungs. The trachea extends from the larynx and branches into the two primary bronchi. At the top of the trachea the cricoid cartilage attaches it to the larynx. This is the only complete ring, the others being incomplete rings of reinforcing cartilage. The trachealis muscle joins the ends of the rings and these are joined vertically by bands of fibrous connective tissue – the annular ligaments of trachea. The epiglottis closes the opening to the larynx during swallowing.




18. Dog Ureter (c.s):

In human anatomy, the ureters are tubes made of smooth muscle fibers that propel urine from the kidneys to the urinary bladder. In the adult, the ureters are usually 25–30 cm (10–12 in) long and ~3–4 mm in diameter.








Wait for part 2.

Did you learn anything? Let me know in the comment section↓
















About Dan the Young Scientist

Science is my Life!
This entry was posted in Experiments and Studies and tagged , , , , . Bookmark the permalink.

3 Responses to Let’s Look at Slides #1

  1. This took me 2 hours to do. Why is that? Well, I don’t have much time any more, and I’m a little busy with my youtube channel. Anyway, how many likes can I get?


  2. Robyn Haynes says:

    Dan I enjoyed this post. I found the slides and your explanations fascinating

    Liked by 1 person

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