- Which animal is most dangerous in the world?
- How long is the longest axon in the human body?
- Do you know which cell is the longest in all animals?
- What is the longest neuron?
- Which animal species would have the longest axons?
- Which is the largest cell?
- How large is a blue whale brain?
- What’s the smartest animal in the world?
- What are the 5 main parts of a neuron?
- Why did we not know about cells until the seventeenth century?
- Which cell does not have nucleus?
- Which animal cell is long and branched?
- What animal has the largest brain?
- Who discovered cell?
- Which is the smallest animal cell?
- What is the ugliest animal on earth?
- What is the longest axon in the human body?
- Which animal has the longest nerve cell?
Which animal is most dangerous in the world?
Of all the species in the world, the largest—and most dangerous—is the saltwater crocodile.
These ferocious killers can grow up to 23 feet in length, weigh more than a ton, and are known to kill hundreds each year, with crocodiles as a whole responsible for more human fatalities annually than sharks..
How long is the longest axon in the human body?
Some axons can extend up to one meter or more while others extend as little as one millimeter. The longest axons in the human body are those of the sciatic nerve, which run from the base of the spinal cord to the big toe of each foot.
Do you know which cell is the longest in all animals?
Answer Expert Verified Nerve cell is longest cell in the body ,and in that, the longest never cell is Sciatic which runs from each side of the lower spine.
What is the longest neuron?
The longest neuron in the human body has a single threadlike projection (the axon), a few micrometers in diameter, that reaches from the base of the spine to the foot, a distance of up to one meter.” For axon length of over a meter see Cavanagh (1984, PMID 6144984 p.
Which animal species would have the longest axons?
Which animal species would have the longest axons? The longest axons occur in the largest animals. For example, giraffes and elephants have axons that extend from the spinal cord to the feet, nearly 2 meters away.
Which is the largest cell?
ovumThe largest cell is ovum in the human body. The ovum also called egg cell is the reproductive cell in the female body. Ovum is 20 times bigger than the sperm cells and has a diameter of about 0.1 mm.
How large is a blue whale brain?
The adult sperm whale brain is 8,000 cubic centimeters. Our brain is about 1300 cubic centimeters.
What’s the smartest animal in the world?
DolphinsDolphins. Dolphins are well-documented as intelligent animals. They can recognize themselves in a mirror and communicate with each other. Their large brain is structured for awareness and emotion, and dolphin brains are even more structurally complex than those of humans.
What are the 5 main parts of a neuron?
Parts of a neuronCell body. Also known as a soma, the cell body is the neuron’s core. … Axon. An axon is a long, tail-like structure which joins the cell body at a specialized junction called the axon hillock. … Dendrites. Dendrites are fibrous roots that branch out from the cell body.
Why did we not know about cells until the seventeenth century?
Before the invention of the microscope, people studying living organisms saw whole and complete organisms and did not imagine that life was subdivided into smaller compartments. … Because cells are microscopic, their existence was not discovered until the seventeenth century.
Which cell does not have nucleus?
ProkaryotesProkaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique evolutionary lineages.
Which animal cell is long and branched?
nerve cells are branched in animals like humans. An animal cell which has a branched structure is nerve cell also known as neuron.
What animal has the largest brain?
sperm whaleThe sperm whale has the biggest brain of any animal species, weighing up to 20 pounds (7 to 9 kilograms). Larger brains don’t necessarily make a smarter mammal. But as mammals evolved, many groups, from Primates to Carnivora, have shown independent increases in brain size.
Who discovered cell?
Robert HookeInitially discovered by Robert Hooke in 1665, the cell has a rich and interesting history that has ultimately given way to many of today’s scientific advancements.
Which is the smallest animal cell?
Mycoplasma gallicepticumThe smallest cell is Mycoplasma gallicepticum. It is about 10 micrometer in size. The largest cells is an egg of ostrich.
What is the ugliest animal on earth?
The world’s ugliest animals – in picturesCheer up; you’re a winner: The blobfish (Psychrolutes marcidus), a species that lives at great depths and is rarely seen but resembles a marine Jabba the Hut, has been voted the world’s ugliest animal. … Need a face lift?More items…•
What is the longest axon in the human body?
sciatic nerveThe longest axons of the human body are those that make up the sciatic nerve where the length can exceed one meter.
Which animal has the longest nerve cell?
blue whaleTherefore the longest axon in the blue whale, which is itself the largest mammal, is probably the DRG.