The phylum Arthropoda is the largest phylum or group of animals in the Kingdom Animalia.
What is the largest group of animals in the world?
Arthropods (spiders, insects and other invertebrates with hard exteriors) make up the largest animal group on Earth, but only one arthropod species can claim the title of largest by size: the Japanese spider crab (Macrocheira kaempferi).
What are the two largest groups of animals?
The two main groups of animals are vertebrates and invertebrates.
What is the second largest animal in the world?
The fin whale is the second largest animal to ever live, in the entire history of Earth. Reaching lengths of at least 85 feet (26 m) and weights of 80 tons, this species is second only to its close relative, the blue whale.
What animal has 3 hearts?
The giant Pacific octopus has three hearts, nine brains and blue blood, making reality stranger than fiction. A central brain controls the nervous system. In addition, there is a small brain in each of their eight arms — a cluster of nerve cells that biologists say controls movement.
What are the 7 classifications of animals?
There are seven main taxonomic ranks: kingdom, phylum or division, class, order, family, genus, species.
Which classes has the largest number of animals?
In terms of numbers of species, insects certainly represent the largest percentage of the world’s organisms. There are more than 1 million species of insects that have been documented and studied by scientists.
What two groups are animals divided into?
The animal kingdom is divided into two groups: vertebrates and invertebrates. Vertebrates have been around for millions of years but have evolved and changed over time. The word vertebrate means “having a backbone.” Many animals have backbones. You have a backbone.
What animal is the most dangerous?
List
| Source: CNET | Source: BBC News | |
|---|---|---|
| Animal | Humans killed per year | |
| 1 | Mosquitoes | 725,000 |
| 2 | Humans (homicides only) | 50,000 |
| 3 | Snakes | 25,000 |
Who is the smallest animal in the world?
The Kitti’s hog-nosed bat is the world’s smallest mammal at 1.1 inches. Averaging between 1.1-1.3 inches (2.8-3.3 centimeters) with head and body combined, the Kitti’s hog-nosed bat, or Craseonycteris thonglongyai, is the world’s smallest mammal.
What are the 5 largest animals in the world?
Top 10 Biggest Animals
- Blue Whale. The Blue whale is the largest animal of all time, reaching a weight of about 198 US tons (180 tonnes) and a length of 98 ft (30 m).
- Colossal Squid. …
- African Elephant. …
- Giraffe. …
- Brown Bear. …
- Whale Shark. …
- Saltwater Crocodile. …
- Ostrich. …
What animal has 32 brains?
Leech has 32 brains. A leech’s internal structure is segregated into 32 separate segments, and each of these segments has its own brain. Leech is an annelid.
What animal has 800 stomachs?
etruscan shrew has 800 stomachs.
What animal has no blood?
Hydra doesn’t have blood. It is a single-cellular animal. In the hydra, respiration is accomplished via diffusion of molecules of oxygen and carbon dioxide through the skin whereas earthworm, cockroach and octopus has blood.