\documentclass[10pt,a4paper]{article}

% Packages
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\usepackage{multicol}           % Allows multicols in tables
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\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{Tazz (Tonoya)}
\pdfinfo{
  /Title (erythrocytes.pdf)
  /Creator (Cheatography)
  /Author (Tazz (Tonoya))
  /Subject (Erythrocytes Cheat Sheet)
}

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% This two commands together give roughly
% the right line height in the tables
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% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
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% Header and Footer
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\fancyhead{} % Set header to blank
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\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Erythrocytes Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Tazz (Tonoya)} via \textcolor{DarkBackground}{\uline{cheatography.com/162324/cs/34088/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}Tazz (Tonoya) \\
  \uline{cheatography.com/tonoya} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 9th September, 2022.\\
   Updated 9th September, 2022.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
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  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Erythrocytes}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Erythrocytes are originated from liver and spleen in embryonic stage. After birth they go to the liver and replace their nucleus by haemoglobin.% Row Count 3 (+ 3)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Transportation of oxygen}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{In Pulmonary capillary, the haemoglobin of erythrocytes reacts with oxygen and produces Oxyhaemoglobin} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Haemoglobin+Oxygen -{}-{}-{}-{}-{}-\textgreater{} Oxyhaemoglobin} \tn 
% Row Count 4 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{These Oxyhaemoglobin are transported through the blood to the cell after that.} \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Pulmonary capillary -{}-{}-\textgreater{} Pulmonary vein -{}-{}-\textgreater{} left atrium-{}-{}-\textgreater{} bicuspid valve -{}-{}-\textgreater{} left ventricle -{}-{}-\textgreater{} semi lunar valve-{}-{}-\textgreater{} aorta -{}-{}-\textgreater{} artery-{}-\textgreater{} arteriole-{}-{}-\textgreater{} capillary} \tn 
% Row Count 10 (+ 4)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{In terminal capillary of the body, Oxyhaemoglobin make oxygen free. These free oxygen diffuse to the lymph. At last, these enter into the cell} \tn 
% Row Count 13 (+ 3)
% Row 5
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Terminal capillary-{}-{}-\textgreater{} lymph -{}-{}-\textgreater{} cell} \tn 
% Row Count 14 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Transportation of carbon dioxide}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Carbon dioxide is produced in the cell due to respiration. These carbon dioxide diffuse to the lymp from the cell and enters into the terminal capillary of the body.} \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Cell -{}-{}-\textgreater{} lymph -{}-{}-\textgreater{} terminal capillary} \tn 
% Row Count 5 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{In plasma, there are huge number of water. Carbon dioxide reacts with the water and produce carbonic acid.} \tn 
% Row Count 8 (+ 3)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{CO`2`+H`2`O -{}-{}-\textgreater{} H`2`CO`3`} \tn 
% Row Count 9 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Carbonic acid is an unstable compound. So it breaks down into bi carbonate.} \tn 
% Row Count 11 (+ 2)
% Row 5
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{H`2`CO`3` -{}-{}-\textgreater{} H\textasciicircum{}+\textasciicircum{} +  HCO`3`\textasciicircum{}-\textasciicircum{}} \tn 
% Row Count 12 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{These bicarbonate reacts with the potassium ion of the erythrocytes and produce sodium bicarbonate and potassium carbonate.} \tn 
% Row Count 15 (+ 3)
% Row 7
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{HCO`3`\textasciicircum{}-\textasciicircum{} + K\textasciicircum{}+\textasciicircum{} -{}-{}-\textgreater{} KHCO`3`} \tn 
% Row Count 16 (+ 1)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{HCO`3`\textasciicircum{}-\textasciicircum{} + Na\textasciicircum{}+\textasciicircum{} -{}-{}-\textgreater{} NaHCO`3`} \tn 
% Row Count 17 (+ 1)
% Row 9
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{These potassium bicarbonate and sodium bicarbonate transport to the Pulmonary capillary} \tn 
% Row Count 19 (+ 2)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Terminal capillary-{}-{}-\textgreater{} venniolous -{}-{}-\textgreater{} branches of vein -{}-{}-\textgreater{} vein -{}-{}-\textgreater{} inferior and superior vena cave -{}-{}-\textgreater{} right atrium-{}-{}-\textgreater{} tricuspid valve -{}-\textgreater{} right ventricle-{}-{}-\textgreater{} semi lunar valve -{}-{}-\textgreater{} Pulmonary aorta -{}-{}-\textgreater{} Pulmonary capillary} \tn 
% Row Count 24 (+ 5)
% Row 11
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{In Pulmonary capillary, potassium bicarbonate and sodium bicarbonate break down and release carbon dioxide. These carbon dioxide diffuse to the alveolous of the lungs.} \tn 
% Row Count 28 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}