Bacterial Cell Structures

The three main shapes of bacterial cells are cocci (spherical), bacilli (rod-shaped), and spirilla (spiral-shaped). Examples of cocci include Staphylococcus aureus, Streptococcus pneumoniae, and Neisseria meningitidis.

Cocci bacteria are round or oval-shaped and can be found in single cells, pairs, chains, clusters, or irregular masses. They are the most common bacterial shape and can be found in various habitats like the human body, soil, and water.

Bacilli bacteria are rod-shaped and can be found in single cells, pairs, chains, or filaments. Some bacilli can also form endospores, which are resistant structures that allow the bacteria to survive.

<p>Examples of bacilli bacteria include Escherichia coli, which can cause gastrointestinal infections, and Mycobacterium tuberculosis, which can cause tuberculosis.</p> Signup and view all the answers

<p>Endospores are resistant structures that allow certain bacteria, such as some bacilli, to survive harsh conditions. Bacillus and Clostridium are examples of bacteria that can form endospores.</p> Signup and view all the answers

<p>Neisseria meningitidis is a cocci-shaped bacteria that can cause meningitis.</p> Signup and view all the answers

<p>Cocci can be arranged in pairs, chains, clusters, or irregular masses.</p> Signup and view all the answers

<p>Endospores are resistant structures that some bacilli bacteria can form to survive harsh conditions.</p> Signup and view all the answers

<p>Bacilli bacteria can be found in a variety of habitats.</p> Signup and view all the answers

<p>Cocci (spherical bacteria) is the most common bacterial shape.</p> Signup and view all the answers