Leukocytes protect the body from microbial, viral and parasitic infections, allergens, cancer-causing cells, and substances causing inflammation. They also scavenge dead and decaying cells and tissues. Leukocytes belong to the five different classes, which are distinguished functionally and morphologically with each class exhibiting complex internal structural differences.

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Answer 1

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 18, Problem 7TYR

Summary Introduction

Introduction:

Leukocytes protect the body from microbial, viral and parasitic infections, allergens, cancer-causing cells, and substances causing inflammation. They also scavenge dead and decaying cells and tissues. Leukocytes belong to the five different classes, which are distinguished functionally and morphologically with each class exhibiting complex internal structural differences.

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Answer 2

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 18, Problem 7TYR

Summary Introduction

Introduction:

Leukocytes protect the body from microbial, viral and parasitic infections, allergens, cancer-causing cells, and substances causing inflammation. They also scavenge dead and decaying cells and tissues. Leukocytes belong to the five different classes, which are distinguished functionally and morphologically with each class exhibiting complex internal structural differences.

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Answer 3

Question

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 18, Problem 7TYR

Summary Introduction

Introduction:

Leukocytes protect the body from microbial, viral and parasitic infections, allergens, cancer-causing cells, and substances causing inflammation. They also scavenge dead and decaying cells and tissues. Leukocytes belong to the five different classes, which are distinguished functionally and morphologically with each class exhibiting complex internal structural differences.

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Answer 4

Question

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 18, Problem 7TYR

Summary Introduction